yashsingh1/xdaforums huggingface dataset:
[OnePlus 7T & 7T Pro Cross Device Development] Lossyx:
If you want to do a full backup then you can select every partition. The data backup only backs up apps and data, not internal storage as far as I'm aware.
[OnePlus 7T & 7T Pro Cross Device Development] RickE19999:
Confirmation that this works with LineageOS 18.1-20211212-NIGHTLY-hotdogb on 7T (HD1905)

Backup of all partitions including super to internal storage (/sdcard/twrp/...) works -- restores not tested

However if using USB-OTG, all partitions will backup (presumably correctly) except super - it gets an error after a couple minutes. This behavior was also displayed in earlier test releases before the official TWRP 3.6 - I was lazy and didn't post - my bad. edit: Problem found. Super Partition was larger than the 4GB limit on file size of FAT32 formatted USB Flash Drive -- reformat the UFD to exFat with Windows 8.1 eliminated the error. Additional commentary in reply below.

Spoiler content hidden.
[OnePlus 7T & 7T Pro Cross Device Development] Han-Droid:
talking about "backing up to pc": what is the FASTEST way (in terms of transfer-speed) to transfer data from OP7T to PC? I remember horrible transfer rates and that there ARE ways to improve speed (security software on PC, driver optimizations...etc.) but cannot remember. so what would you, Brandon, recommend to use. I'm trying to avoid waiting hours for the backup to complete.... ;-)
[OnePlus 7T & 7T Pro Cross Device Development] Mogster2K:
Do you have a USB 3.0 cable for your phone? The cable included with the OP7T is only USB 2.0.
[OnePlus 7T & 7T Pro Cross Device Development] GrayJack:
It was reported when "parallel application" feature is used TWRP cannot decrypt /data for user 999.

I cannot check it because I am not using "parallel application" feature.

Can anybody check is it true or not?

P.S. We are talking about OOS11 on OP7TPro and corresponding TWRP type 1.
[OnePlus 7T & 7T Pro Cross Device Development] pedritopl:
Hi, I'm not using the paraller apps feature, but I hope this is also relevant - I have a "work profile" which also creates a new user (ID 11 if I'm not mistaken). I can confirm TWRP cannot decrypt that users data.
[OnePlus 7T & 7T Pro Cross Device Development] Brandon.Bissonnette:
Yes, when I used parallel apps user999 couldn't decrypt also it wasn't enough for me to just disable parallel apps, I had to delete the 999 folder in data/user
[OnePlus 7T & 7T Pro Cross Device Development] GrayJack:
So it looks like a confirmed bug so let's wait @Lossyx to get it fixed.
[OnePlus 7T & 7T Pro Cross Device Development] Han-Droid:
Yes, I purchased one a while ago ;-)
[OnePlus 7T & 7T Pro Cross Device Development] AnkeshReborn:
So I can use this lossyx recovery on kosp android 12 version and flash magisk.zip to get root working?
[OnePlus 7T & 7T Pro Cross Device Development] AnkeshReborn:
Which TWRP to use on 12 based custom ROM to flash magisk,etc?
[OnePlus 7T & 7T Pro Cross Device Development] Lossyx:
https://xdaforums.com/t/recovery-11...overy-project-7t-7t-pro.4299171/post-86102437
[OnePlus 7T & 7T Pro Cross Device Development] AnkeshReborn:
Also I need to remove any kind of password/authentication from the device so that I can access files on SD right? And then I'll be able to flash magisk. Also the AFH mirror is so damn slow, it's downloading at a snail's pace.
[OnePlus 7T & 7T Pro Cross Device Development] HueyT:
You can't boot it. U must flash it
[OnePlus 7T & 7T Pro Cross Device Development] EinsteinXXL:
Decryption of user 999 failed when pin was set (OOS 10).
[OnePlus 7T & 7T Pro Cross Device Development] RickE19999:
Would be nice if TWRP told me it couldn't put super partition larger than 4GB on FAT format flash drive or broke partition into less than 4GB chunks as is done, I think, for data partition.

In any event thanks to Lossyx for all his hard work and Happy New Year to all!
[OnePlus 7T & 7T Pro Cross Device Development] Brandon.Bissonnette:
That's not TWRP's problem, that's a FAT limitation. Use exFAT
[OnePlus 7T & 7T Pro Cross Device Development] RickE19999:
Agreed use exFAT, however I think it is TWRP's problem (not necessarily Lossyx's) that it attempts to perform the backup for several minutes and then produces (as best that I've discovered) an error that contains no information as to the cause of said error. Also, appears to work without error on the data partition which is also way larger than 4GB by splitting the backup file into chunks smaller than 4GB.
[OnePlus 7T & 7T Pro Cross Device Development] somemadcaaant:
Hi Lossy and team, used 3.6.0_11 Test TWRP file and removed lock security screen password but not able to see SDCARD for Derpfest 12.

Also do I need to format Data or change file system of Data? Currently f2fs

Log states:

unable to decrypt FBE device

Failed to decrypt data.

Unable to decrypt with default password. You may need to perform a format Data.

...

Full SELinux support is present.

Unable to locate Storage device.

...

MTP already enabled.

Thanks again.

Edit: device is 7t Pro HD1913
[OnePlus 7T & 7T Pro Cross Device Development] HueyT:
Which device? Needs v2 test which stands for fbev2
[OnePlus 7T & 7T Pro Cross Device Development] somemadcaaant:
HD1913 - 7t Pro
[OnePlus 7T & 7T Pro Cross Device Development] ywlke:
Android File Host seems to be having issues, it keeps telling me "no mirrors found". Any chance you could upload it somewhere else?
[OnePlus 7T & 7T Pro Cross Device Development] HueyT:
See attached
[OnePlus 7T & 7T Pro Cross Device Development] HueyT:
Above
[OnePlus 7T & 7T Pro Cross Device Development] ywlke:
Thanks!
[OnePlus 7T & 7T Pro Cross Device Development] slapman:
Hi, question so if I install version for stock OOS can I make a backup and then flash a Custom Rom. Or will I have to flash a custom ROM and then flash custom ROM TWRP version? It would be awesome if we had the ability to flash the stock OOS back up data with out having to lose data and use MSM tool to do the whole process from scratch.
[OnePlus 7T & 7T Pro Cross Device Development] HueyT:
FBEv1 encryption includes oos, LOS18.1, Omni, crdroid, eelo. This is above twrp v1 (test allows LOS18.1 decryption). All the rest custom A11 uses FBEv2 on twrp.me. Custom A12 uses FBEv2 test twrp on Android File Host
[OnePlus 7T & 7T Pro Cross Device Development] ywlke:
I think Crdroid recently swtiched to FBEv2, based on the commit logs. I haven't tried it (yet) so can't speak firsthand.
[OnePlus 7T & 7T Pro Cross Device Development] HueyT:
Possibly, in past, they always followed LOS18.1--confirmed, latest crdroid 7.3 from sourceforge is indeed fbev2
[OnePlus 7T & 7T Pro Cross Device Development] rob420p:
I've already installed noproblem so far I'm still on stock but as I look at the custom roms for hotdogs most say side load.is there any roms u can flash with this?
[OnePlus 7T & 7T Pro Cross Device Development] bynarie:
So I'm just booting TWRP right now. Not flashing. Keeps telling me I need to/cant decrypt user 10 (Avalon) or something like that. Any idea what that means or what I need to do?
[OnePlus 7T & 7T Pro Cross Device Development] HueyT:
Which op7 device? Avalon is not correct model for this twrp
[OnePlus 7T & 7T Pro Cross Device Development] pomeroythomas:
EDIT: was indeed missing something
[OnePlus 7T & 7T Pro Cross Device Development] Wlayey:
Will this TWRP work on OOS 10.0.13? In the past there was no way to decrypt data, and flash magisk, can this be done with this TWRP?
[OnePlus 7T & 7T Pro Cross Device Development] HueyT:
Try official V1 for oos

Download twrp-installer-3.6.0_11-0-hotdog.zip

Download page for twrp-installer-3.6.0_11-0-hotdog.zip

dl.twrp.me
[OnePlus 7T & 7T Pro Cross Device Development] Mogster2K:
Is it possible to have a single TWRP that can handle both FBEv1 and v2?
[OnePlus 7T & 7T Pro Cross Device Development] Lossyx:
No.
[OnePlus 7T & 7T Pro Cross Device Development] bynarie:
OP7T HD1907. Also, OOS 11.0.5.1HD65AA
[OnePlus 7T & 7T Pro Cross Device Development] HueyT:
Twrp.me v1
[OnePlus 7T & 7T Pro Cross Device Development] hectorviov:
Would this be able to decrypt data on custom ROMs?
[OnePlus 7T & 7T Pro Cross Device Development] HueyT:
Sure
[OnePlus 7T & 7T Pro Cross Device Development] droidvark:
v1 for oos, v2 for custom roms right?

Coming from oos 11.0.5 I followed instructions for lineage 18. After installing their recovery I formatted data. I think that should have cleared oos encryption and change it to FBEv2 right?

After succesful installation of Lineage and Magisk, I flashed twrp-3.6.0_11-0-hotdogv2 image to both slots.

When I enter twrp, I go to Mount and decrypt data. It asks for a password and says Failed to decrypt data.

I tried with v1 as well but I get the same thing.

Any ideas what Im doing wrong?
[OnePlus 7T & 7T Pro Cross Device Development] HueyT:
Lineage, Omni, Havoc, LeeOS uses old fbev1 (Chinese twrp)
[OnePlus 7T & 7T Pro Cross Device Development] ywlke:
You need this version: https://xdaforums.com/t/recovery-11...overy-project-7t-7t-pro.4299171/post-86229749
[OnePlus 7T & 7T Pro Cross Device Development] droidvark:
Thanks and I hate to ask, but how are recovery images as zips installed?

I tried sideloading. I have the L18.1 recovery in adb sideload mode but after accepting the signature verification failure, I get:

E: Failed to find update binary META-INF/com/google/android/update-binary

When I try to search, I find info about flashing zips with twrp, not how to flash twrp as a zip. Moreover, the error above doesn't lead me to a working solution. On the twrp instructions page, they say to flash with fastboot (and give instructions for it) OR say to "use the installer zip" (without instructions).
[OnePlus 7T & 7T Pro Cross Device Development] ywlke:
Unzip the download, boot into bootloader (not recovery), then fastboot flash recovery path/to/file.img
[OnePlus 7T & 7T Pro Cross Device Development] droidvark:
I feel like an idiot :). Most zips contain an install script with those META dirs etc, I thought this was the same thing, I didnt realize it was just the flashable img file zipped up :D.

Thanks!
[OnePlus 7T & 7T Pro Cross Device Development] seadersn:
...and there's the "install image" button bottom right in twrp's install section :) just copy twrp img to your internal storage and select it then to flash onto recovery partition.
[OnePlus 7T & 7T Pro Cross Device Development] wugga3:
Ok my turn to be the idiot... (I've only ever twrp Samsung so this is my first non-Samsung).

Are you referring to installing the twrp image from the TWRP App? Cause I tried that App and it crashes... No worries though... Fastboot it shall be.

Sent from my Magisk 24.1 rooted OnePlus 7t (HD1900) OOS11.0.5.1 global

Thanks
[OnePlus 7T & 7T Pro Cross Device Development] wugga3:
Edits... Useless double post... Sorry
[OnePlus 7T & 7T Pro Cross Device Development] HueyT:
No. Install image has to be done by twrp recovery itself which has to be installed by "fastboot flash recovery twrprecovery.img" while in bootloader mode
[OnePlus 7T & 7T Pro Cross Device Development] wugga3:
Thanks @HueyT

That was simple and easy.

So that's the back up that created TWRP image. I'm hoping that's all I needed to accomplish a working restoration image (while I understand that this still doesn't include some parts of information, ex: pictures?/app data??). Therefore, it's still recommended to use Titanium back up and restore that back up after the TWRP IMG is restored?? Again... Sorry new I'm still new to OnePlus having only used Samsung/ODIN....
[OnePlus 7T & 7T Pro Cross Device Development] Lossyx:
TWRP does not backup internal storage, neither does Titanium Backup. You have to transfer the folders manually to your computer or external storage.
[OnePlus 7T & 7T Pro Cross Device Development] rob420p:
sadly i had mahor issues flashing any rom a11 or a12 im in a mean soft brick phone is not being read in my comp going to try to fix it later any suggestions would be great.
[OnePlus 7T & 7T Pro Cross Device Development] HueyT:
Msmtool
[OnePlus 7T & 7T Pro Cross Device Development] ac386:
Does it work for flashing a12 builds?
[OnePlus 7T & 7T Pro Cross Device Development] Lossyx:
Maybe. Although, I wouldn't use this at all on A12 for now.
[OnePlus 7T & 7T Pro Cross Device Development] Aswin08:
Thanks for the recovery. it helped me recover my files.
[OnePlus 7T & 7T Pro Cross Device Development] ricky886:
Finally, 7T pro have a full functional recovery.

Really thanks!!!
[OnePlus 7T & 7T Pro Cross Device Development] EinsteinXXL:
Not really. Unable to decrypted parallel app data (OOS 10)
[OnePlus 7T & 7T Pro Cross Device Development] ibawon:
can i use this to flash PE12 ROM?
[OnePlus 7T & 7T Pro Cross Device Development] HueyT:
No. You must use pe recovery (adb sideload PE12rom.zip with PC) or Chinese twrp to flash pe12 (may flash in twrp using phone)
[OnePlus 7T & 7T Pro Cross Device Development] Paprika77:
Hi Everyone,

Some time ago I had an unfortunate accident with my 7TPro:

https://xdaforums.com/t/recover-data-from-a-broken-device.4402313/

Since no answers came, I tried to flash TWRP over the Lineage Recovery, which in turn, works, abeit, with flaws, since I simply cannot decryt the data partition. I know that the password is correct, still, no luck.

I hope it's a good sign, that I can see the folder structure/files at least encrypted, but another issue is, with TWRP MTP mount, I cannot copy those files from the phone to the PC (errors out on copy).

Right now I'm wondering, is there a TWRP version for this phone that could decrypt my data? (A10)

Tested: 3.6.0_11 & 3.6.1_11 both FBEv2 and FBEv1 no luck. FBEv2 is the correct one as, my ROM is custom:

https://xdaforums.com/t/closed-eol-...lineageos-17-1-oneplus-7t-pro.4222945/page-14

Also the FBEv1 shows 0MB data, and cannot mount it even in the encrypted format.

Any help is apprecated, Thank you all in advance!
[OnePlus 7T & 7T Pro Cross Device Development] Lossyx:
https://xdaforums.com/t/recovery-11...overy-project-7t-7t-pro.4299171/post-86142101
[OnePlus 7T & 7T Pro Cross Device Development] Paprika77:
No luck with that either :( Same as with the regular 3.6.0/.1 cannot decrypt, can mount as mtp, cannot copy from phone
[OnePlus 7T & 7T Pro Cross Device Development] Paprika77:
Hi,

If you mean this one:

recovery-oneplus7t-3.4.2-10.0-b26.img | by matt0301 for OnePlus 7T

Download GApps, Roms, Kernels, Themes, Firmware, and more. Free file hosting for all Android developers.

androidfilehost.com

It does not even have the option to decrypt, no button or whatsoever. But, Indeed, it's chinese :)
[OnePlus 7T & 7T Pro Cross Device Development] Adithya88:
does the latest TWRP support A12?
[OnePlus 7T & 7T Pro Cross Device Development] HueyT:
Yes, fbev2

twrp-3.6.0_11-0-hotdogv2-test.img | by lossyx for OnePlus 7T Pro

Download GApps, Roms, Kernels, Themes, Firmware, and more. Free file hosting for all Android developers.

androidfilehost.com
[OnePlus 7T & 7T Pro Cross Device Development] Kalaskas:
So this is finally a full working twrp now?

If i backup my rooted OOS10. I install other ROMs or OOS11 if i want to back its posible now without encryption and partition problems?

Thank you.
[OnePlus 7T & 7T Pro Cross Device Development] HueyT:
Yes, but pick the fbev1 version for oos
[OnePlus 7T & 7T Pro Cross Device Development] HueyT:
Download twrp-installer-3.6.1_11-0-hotdog.zip

Download page for twrp-installer-3.6.1_11-0-hotdog.zip

dl.twrp.me
[OnePlus 7T & 7T Pro Cross Device Development] Kalaskas:
Thank you
[OnePlus 7T & 7T Pro Cross Device Development] chuckiler:
and fbev2 for custom ROMs?
[OnePlus 7T & 7T Pro Cross Device Development] HueyT:
Yes
[OnePlus 7T & 7T Pro Cross Device Development] ricky886:
Do this support dual boot?
[OnePlus 7T & 7T Pro Cross Device Development] HueyT:
Only using slot A or slot B with 2 roms which can share same data using same file system like ext4, f2fs, erofs, etc
[OnePlus 7T & 7T Pro Cross Device Development] Lossyx:
I am dropping the development for this device.

TWRP team is working on A12, so if you want to pick development up for this device be sure to join the zulip chat.
[OnePlus 7T & 7T Pro Cross Device Development] Oswald Boelcke:
Thread has been closed on request of OP @Lossyx

Regards

Oswald Boelcke
[OnePlus 7T & 7T Pro Cross Device Development] parag0n1986:
I can send you a working copy I have @Mogster2K pm me if you want it
[OnePlus 7T & 7T Pro Cross Device Development] HueyT:
fastboot flash recovery twrp.img

fastboot reboot recovery
[OnePlus 7T & 7T Pro Cross Device Development] Lossyx:
Move it to PM or somewhere else if you wanna talk about another recovery other than the one in the OP
[OnePlus 7T & 7T Pro Cross Device Development] a g bell:
I don't l just want to know where to DL your latest build for stock OOS 11 please
[OnePlus 7T & 7T Pro Cross Device Development] Moe2003:
any issues left with this twrp? like is everything working?
[OnePlus 7T & 7T Pro Cross Device Development] Lossyx:
Should be in the GitHub link.

I am trying to migrate everything to AndroidFileHost (with new builds) but seems to have problems. Hopefully it'll be uploaded soon.
[OnePlus 7T & 7T Pro Cross Device Development] Moe2003:
what current issues are there with the builds? any changes from the ones u wrote in main post?
[OnePlus 7T & 7T Pro Cross Device Development] Lossyx:
New ones (newest date) should have MTP fixed and some upstream changes.

Also, added AndroidFileHost link in the first post.
[OnePlus 7T & 7T Pro Cross Device Development] Moe2003:
is format data working completely fine now?
[OnePlus 7T & 7T Pro Cross Device Development] Lossyx:
Last time I tried it worked on OOS.

ROMs using Project ID Quota, no.

Hopefully that will be just device tree changes, haven't looked into it too much.
[OnePlus 7T & 7T Pro Cross Device Development] freemannhp:
Try the 3.5.2-110_sdcardfs on my 7T with PE, got same error as the one in ver 1.1 in GitHub when backuping Data:

CreateTarFork() process ended with ERROR: 255
[OnePlus 7T & 7T Pro Cross Device Development] pxrave:
i tryd the latest fbev2. working great (its the same file you posted here before right?)
[OnePlus 7T & 7T Pro Cross Device Development] umair shaikh:
Can i use this twrp to wipe data on oos 11 then flash a custom rom without formatting the internal data ?
[OnePlus 7T & 7T Pro Cross Device Development] Nitrogen:
Good question.
[OnePlus 7T & 7T Pro Cross Device Development] mikefnz:
Unlikely.
[OnePlus 7T & 7T Pro Cross Device Development] YourFriendCaspian:
This might be a dumb question but I just want to triple check that this is for the OnePlus 7T Pro 5g Mclaren?
[OnePlus 7T & 7T Pro Cross Device Development] Hitman478™:
Depends on the rom you want to flash but i think that the answer is "no" for every rom. Most of roms for this device require a format data after flash them to work properly.

question: can i return to stock with latest TWRP? If i'm on a custom rom, flashing twice oos11 is working or not?
[OnePlus 7T & 7T Pro Cross Device Development] alero5752:
I'm trying to flash 3.5.2-110_sdcardfs.img on my 7T. But I'm missing Install Recovery Ramdisk option in the advanced menu of TWRP to complete the flash.
[OnePlus 7T & 7T Pro Cross Device Development] Lossyx:
That option is not needed because this phone has a recovery partition. Just flash the recovery as instructed in first post.
[OnePlus 7T & 7T Pro Cross Device Development] ChrisFeiveel84:
What is this twrp twrp-3-5-2_11-hotdog-20210707-oos.img for?

this one is for oos

twrp-3-5-2_11-hotdog-20210707-sdcardfs.img​

but what is the other twrp for? or what's different about it
[OnePlus 7T & 7T Pro Cross Device Development] Lossyx:
Both are basically the same, the -oos one has the prop that made decryption work for OOS.

I wasn't sure if it worked on custom sdcardfs ROMs so I just released separate.
[OnePlus 7T & 7T Pro Cross Device Development] Galaxea:
I have tried this on OOS 10 beta 9 (OP7T) and I get the CreateTarFork error.

I deleted user 999 and it still happens.

I tried both versions of TWRP (oos and sdcardfs) but neither work for me.

Am I missing something?
[OnePlus 7T & 7T Pro Cross Device Development] 1aladdin1:
would it interfere with subsequent OOS-updates when I flash this recovery?
[OnePlus 7T & 7T Pro Cross Device Development] osm0sis:
Not if it detects you are unlocked and gives you the full OTAs.
[OnePlus 7T & 7T Pro Cross Device Development] parag0n1986:
Is there anything I can help you do to get this up and running a little better? I'm not a developer by any means, but I will gladly test for you? What programming language would I have to learn to help with coding for TWRP? Thank you very much for everything you've gotten accomplished already!

@Lossyx got a 7 pro now, but willing to test on 7t pro if you need.
[OnePlus 7T & 7T Pro Cross Device Development] Hitman478™:
Why you dont flash it through fastboot?
[OnePlus 7T & 7T Pro Cross Device Development] osm0sis:
7T has a dedicated recovery partition, so you just use flash image to both slots from within TWRP, or, fastboot flash to recovery_a and recovery_b manually.
[OnePlus 7T & 7T Pro Cross Device Development] GetRekt99:
Is there an installer in development? Really curious not asking for eta
[OnePlus 7T & 7T Pro Cross Device Development] Lossyx:
I could upload one later, not completely sure why it's needed though.

Flashing an .img in TWRP is supported, that's what I do after flashing a rom.
[OnePlus 7T & 7T Pro Cross Device Development] osm0sis:
It's useful for flashing post-OTA via the Magisk app on booted Android. :)

I recently updated the template so that for recovery_a/_b devices you can just drop the whole .img into the zip instead of the .cpio and it'll flash it whole to both partitions.
[OnePlus 7T & 7T Pro Cross Device Development] dosnoventa:
i checked the log and it seems to be data/misc_de/0 or user 0, this happened to me on OOS 10.3.2, not sure if deleting user0 will solve the problem or brick my phone, i know this has to do with parallel apps but I'm not sure on what purpose 0 serves
[OnePlus 7T & 7T Pro Cross Device Development] Lossyx:
If anyone wants to try out, this should format properly on ROMs using project id quota and casefolding, like yaap.

Test version

twrp-3-5-1_11-hotdog-20210728-fbev2-test.img | by lossyx for OnePlus 7T Pro

Download GApps, Roms, Kernels, Themes, Firmware, and more. Free file hosting for all Android developers.

androidfilehost.com
[OnePlus 7T & 7T Pro Cross Device Development] ChrisFeiveel84:
your

twrp-3-5-2_11-hotdog-20210707-fbev2.img​

can formart data and flash custom rom

i have used your twrp for flash crdroid 7.8 on my 7t and have formartet data with you twrp to f2fs and crdroid is booting and running great

(only in fastbootd my cell phone no longer wants to use the twrp)
[OnePlus 7T & 7T Pro Cross Device Development] ChrisFeiveel84:
oh a new twrp 3.5.1_11fbev2 why not 3.5.2- 11 fbev2 ??
[OnePlus 7T & 7T Pro Cross Device Development] Muxeu:
Have tried to make backup /data by twrp-3-5-1_11-hotdog-20210701-oos11.img on OOS11 Beta5.

TWRP was not installed, just booted

fastboot boot twrp.img
[OnePlus 7T & 7T Pro Cross Device Development] freemannhp:
I tried the fbve2 test version on my 7t with Yaap. It seems to format data properly. And it backed up super and data successfully. However, after it restored both partitions, my phone had bootloop. My data was encrypted.
[OnePlus 7T & 7T Pro Cross Device Development] HueyT:
U have to restore all but data, go through setup except skip google restore, set screen lock to "none", reboot to twrp, reinstall magisk.zip, restore data, reboot. Then all will work
[OnePlus 7T & 7T Pro Cross Device Development] freemannhp:
Thanks for the info, will try it next time.
[OnePlus 7T & 7T Pro Cross Device Development] pxrave:
twrp-3-5-2_11-hotdog-20210707-fbev2.img​

i found out another bug.

i cant make any download with this version in fastboot and adb. i rebooted to this twrp and flashed latest los recovery. all works fine.

so there is some bug in your twrp doesnt allow fastbootd mode.
[OnePlus 7T & 7T Pro Cross Device Development] Lossyx:
What do you mean? Can't you flash anything within TWRP's fastbootd?