yashsingh1/xdaforums huggingface dataset:
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] stryver:
Restoring system and vendor is known not to work. As a workaround we are instructed to backup system.img and vendor.img instead of the usual system and vendor folders.
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] matrix.bharath:
For me data backup doest work
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] sabrdawg:
I was able to backup data, however it wouldn't restore. Now I know why :) So...I can back up system and data as an .img and then restore it that way? Just making sure I understand.
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] suzook:
This phone is F'd....Thats why. Never had so many issues with twrp, until this POS.

---------- Post added at 04:38 PM ---------- Previous post was at 04:15 PM ----------

Extracttarfork process ended with error 255.......NO, i dont use multi user, and no, i dont use parallel apps. I cant be the only one with this issue?
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] lollyjay:
Can you provide log?
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] suzook:
Here...
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] TheKnux:
https://xdaforums.com/oneplus-6t/how-to/twrp-dev-compiling-op6t-t3870182/post78433845
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] suzook:
Did you even read???

---------- Post added at 05:11 PM ---------- Previous post was at 05:03 PM ----------

SO, I restored all partitions except data, since data kept failing. I booted to os. I then rebooted to twrp, and data FLASHED!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] Araa01:
Man chill.

Nervous not help u rly.
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] scott45333:
Maybe it would be best to stick to stock... Would save the attitude towards everyone that is trying to help.
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] lollyjay:
I have a life.
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] suzook:
Sorry, that wasn't directed to you. I provided a log.
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] lollyjay:
I barely had time to look at it before I went out. Hope someone can make sense of it
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] twinnfamous:
I only pasted where the error starts and stops.

If you look through towards the middle it says invalid encryption mode

Then it can't find the key so it can't proceed.

E:[MTP] MtpServer::addStorage Storage for storage ID 65537 already exists.
I:Message sent, add storage ID: 65537 '/data/media/0'
Restoring Data (excl. storage)...
Invalid encryption mode file /data/unencrypted/mode
I:InfoManager loading from '/data/media/0/TWRP/BACKUPS/f9076ddb/2018-12-16--13-08-25/data.info'.
I:Read info file, restore size is 8884042240
I:Multiple archives
Invalid encryption mode file /data/unencrypted/mode
Invalid encryption mode file /data/unencrypted/mode
Invalid encryption mode file /data/unencrypted/mode
Invalid encryption mode file /data/unencrypted/mode
Invalid encryption mode file /data/unencrypted/mode
Invalid encryption mode file /data/unencrypted/mode
Invalid encryption mode file /data/unencrypted/mode
Invalid encryption mode file /data/unencrypted/mode
Invalid encryption mode file /data/unencrypted/mode
I:First tar file '/data/media/0/TWRP/BACKUPS/f9076ddb/2018-12-16--13-08-25/data.ext4.win000' not encrypted
I:Setting archive type
I:Extracting uncompressed tar
==> extracting: //data/system_de/ (mode 40770, directory)
==> extracting: //data/system_de/0/ (mode 40770, directory)
Cannot find key for 0
error looking up proper e4crypt policy for '//data/system_de/0/' - 1DE0
tar_extract_file(): failed to extract //data/system_de/0/ !!!
I:Unable to extract tar archive '/data/media/0/TWRP/BACKUPS/f9076ddb/2018-12-16--13-08-25/data.ext4.win000'
Error during restore process.
I:Error extracting '/data/media/0/TWRP/BACKUPS/f9076ddb/2018-12-16--13-08-25/data.ext4.win000' in thread ID 0
I:Error extracting split archive.
Error during restore process.
extractTarFork() process ended with ERROR: 255

If you rebooted then we're able to restore data.

It could of been caused by not being in the slot the data backup was made in.

But that's just a thought. Hope it helps someone
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] Qutayba Khader:
Can any one help me?

Why I can't exploring this directory (/system/priv-app/OPSystemUI) from the recovery ? It's showing empty files !!

Please i changed the OPSystemUI.apk file and the system is not booting now :(

I have the original OPSystemUI.apk but I can't replace it

....

Edit: thank i had to mount the system first before editing.. it's working now

Sorry :)
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] foamerman:
OK guys don't beat me up to bad for asking this but I've seen in here that we installing 9.0.7 in TWRP both slots A/B. I guess my question is when we install it the first time do we pick slot A? then the second time pick slot B? or does TWRP know to put it in the empty slot B the second time? Sorry guys my first duel slot phone.
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] tet-bundy:
In my understanding it will always flash to the currently inactive slot
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] twinnfamous:
U fastboot boot the img then flash the twrp installer that flashes recovery to both slots. Do not flash the img file.
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] foamerman:
Thank You

You misunderstood me I know fastboot .img and install the the .zip. What I'm asking is does twrp know to install the 9.0.7 into slot A and reboot to recovery and install again now does twrp know to install it in slot B or do we pick slot B to install it?
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] suzook:
He didn't misunderstand you. It's flashing both slots when using the .zip
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] Funk Wizard:
Moderator Info

If you have an issue with a post, do not reply, but simply report and move on. Let's keep the discussion related to Development/Development related things and issues moving forward.

Thanks,

Funk

XDA Moderator
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] twinnfamous:
No. Twrp doesn't know to do that. You have to do it manually
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] carterson:
So I just got my OP 6t Mclaren today. I booted up twrp 3.2.3-8 (not flash yet) and made a full back up. Everything went well. I dont know if I should continue flash twrp and magisk v18.

Can anyone confirm it will with this phone?
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] foamerman:
Thank you. That's what I was looking.
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] anthony10126:
Weird. For me with latest twrp .11 I flashed 9.0.7 and checked which slot I was on which was a.. after rebooting back to recovery checked which slot I was on again.. twrp switched me to slot b. After flashing one more time ota, twrp, and magisk, I rebooted again into recovery and I was back in slot a. No manual slot switch needed and I would assume I had both slots updated with 9.0.7/twrp/and magisk..

---------- Post added at 05:43 AM ---------- Previous post was at 05:41 AM ----------

Weird. For me with latest twrp .11 I flashed 9.0.7 and checked which slot I was on which was a.. after rebooting back to recovery checked which slot I was on again.. twrp switched me to slot b. After flashing one more time ota, twrp, and magisk, I rebooted again into recovery and I was back in slot a. No manual slot switch needed and I would assume I had both slots updated with 9.0.7/twrp/and magisk..
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] Striatum_bdr:
Twrp flashes the ROM zip (not just only OOS, any ROM zip) on the inactive slot and sets the inactive one to become the active one at next system boot. That's the way stock OOS recovery flashes full zip OTA too, that's the way A/B phones are designed to work, to be able to come back to old version if there's a major bug. If you flash the zip two times it will flash it to both slots.

I used TWRP to flash 9.0.7 full ROM zip update and had strictly nothin to manually change all was automatic.

---------- Post added at 05:54 AM ---------- Previous post was at 05:48 AM ----------

It's a OnePlus 6t phone whatever the name after 6t is...
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] anthony10126:
Not yet. Going to try when I get home from work to tonight.
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] Funk Wizard:
Moderator Information | Thread Cleaned

Please keep the thread clean and stay on-topic. Flaming other users is not acceptable. If you have an issue with a post, do not reply, but simply report and move on. Everyone is expected to know and follow the forum rules. If you have any confusion, please take a moment to go through them. This is a Development Thread, lets keep the focus and discussion to development related discussion and contribute towards a better TWRP.

Thank you for your understanding,

Funk

Forum Moderator
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] anthony10126:
I have a question.. nothing to do with this thread. I tried making my own thread but the xda app won't let me.. however here is my question.. I just tried updating my greenify module for magisk and it said install fails.. reason is because my API is 28 and the max should be 27??? It also told me to downgrade to a different Android.... Anyone ever year such a thing?? And is there a fix for this???
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] Funk Wizard:
Hello Anthony,

Welcome to XDA community. I would recommend to post your questions or make a thread on Q&A section where the restrictions are relaxed a bit when it comes to making a thread for New users or post in greenify module thread.

Here is greenify specific thread

https://xdaforums.com/apps/magisk/module-greenify4magisk-t3606277

Help keeping this development thread clean and on topic.

Thanks

Funk
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] anthony10126:
[MENTION=9253142]funkwizard[/MENTION] thanks for the input.. Still getting used to the forums.. Very new here with my op6t. Learning things quickly.. thanks for the forum link. I found all the answers to my questions exactly and solved my issue.. Many thanks to you and all the devs. Much appreciated.
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] reppi:
Hm weird. I clean installed my 6T and wanted to flash TWRP again on latest OOS 9.0.10. TWRP always shows encrypted and the password prompt doesnt show up. Tested with version -8 and -11.
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] cultofluna:
Yep... unfortunately twrp decryption fails on 9.0.10
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] H4X0R46:
So I just flashed the open beta 1 through TWRP build -11. It flashed just fine and booted, but now I find that my old slot (from before flashing the beta) no longer boots. On top of that, TWRP now doesn't ask for my PIN to decrypt, my data now shows encrypted in TWRP. What's my next move?
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] mauronofrio:
When 9.0.10 was released?
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] refedit:
Couple hours ago m8
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] cultofluna:
Few hrs ago..

Also 1st OB OP6T is out

https://forums.oneplus.com/threads/oxygenos-open-beta-1-for-oneplus-6t.968242/
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] marahlad:
Did I something wrong? 9.0.10
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] TENlll423:
Read 6 posts up.
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] marahlad:
Oh sorry, my bad.
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] mauronofrio:
On it seems the twrp is working, i made a new build, need a sec to test it, if someone want to test it, please contact me on telegram
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] nowaymatt:
Sideload the open beta thru twrp and the phone will boot! just had the same problem!

EDIT: Magisk won't work phone boots up then turns off and then boots it stock recovery.
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] mauronofrio:
New 3.2.3-12 TWRP Pubblished

Fixed Screenshoots colors;

Fixed decryption for futures updates.

TWRP 3.2.3-12 by mauronofrio

TWRP 3.2.3-12 Installer by mauronofrio
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] Dr. Krieger:
Does it work with 9.0.10 Stable?
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] :
Thanks man!
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] nono77240:
Thanks,

working perfectly with 9.0.10
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] Alcarullo:
Thanks, works flawlessly!
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] mnsor1234:
Hey now I'm on 3.2.3_11 only need the zip for update to. 2.3.3.12 o need the img?
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] ventu87:
HELP!!!!I followed to the letter the update for 9.0.10 with twrp I did the upgrade but now TWRP does not decrypt me anymore 'data help me are without a phone!

I managed to solve the problem of decrypting .. now when you start the system as soon as it comes out the screen to put the pin turns off the phone and goes on TWRP !!! I'm in the **** help !!!
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] buzzboy:
Latest TWRP worked perfectly with 9.0.10.

Many thanks for your continued efforts.
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] mauronofrio:
Use the latest twrp and you shouldn't have problems
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] ventu87:
I did I use the last twrp but as soon as he shows me the screen of the pin and turns off immediately then goes in twrp help me please!
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] mauronofrio:
Which is the version are you using?
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] ventu87:
twrp 3.2.3-12 as soon as the operating system starts up, I immediately get re-installed magisk as described but it does the same thing
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] phillymade:
Someone else reported the same issue on Funks thread. The individual seems to think that Magisk is causing the issue
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] dadoc04:
Thanks much!!
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] LeoPosas:
While in TWRP, choose reboot and select Slot A, then reboot system.
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] cultofluna:
Fastboot boot the new twrp>flash the installer>reboot to twrp >flash magisk >reboot
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] scott45333:
I was able to update with no issues. Here are the steps I followed:

Install TWRP 3.2.3-12

Flash OOS 9.0.10 full update zip / TWRP / Magisk - Reboot to recovery - This will set second partition as active

Flash OOS 9.0.10 full update zip / TWRP / Magisk - Reboot to recovery

Flash kernel (if wanting a custom kernel) / Magisk / kernel - Reboot system

I do it this way so I know both partitions have the latest update and to verify everything is flashed correctly.

Might be over-doing it, bit it works...
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] TENlll423:
Rebooted to recovery> flashed TWRP 3.2.3-12>rebooted recovery>Flashed full OTA>wiped dalvik/cache>flashed TWRP again>rebooted recovery>flashed magisk> rebooted system. All is well!

Thanks Mauronofrio. I really appreciate your dedication to this device. Your work is awesome..
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] anthony10126:
Big thanks to [MENTION=4712355]mauronofrio[/MENTION] for the development of this twrp...

( I already have twrp .11 installed)

Rebooted to recovery, flash latest .12 twrp

rebooted recovery again to make sure all went well

Flashed ota 9.0.10, flashed twrp .12, clear cache, reboot recovery

Install magisk, reboot system

I did this a second time to be sure both partitions have the latest update!!

After first install, Twrp will automatically install the ota on the other partitions..
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] Ellipsis_:
I did pretty much the same (starting off on TWRP .8) although did only the steps I thought necessary, so:

Reboot into recovery and install TWRP .12 and Magisk 18 (I'd read previously that Magisk can need re-applying after updating TWRP but you didn't do this and were OK, so maybe not).

Reboot to recovery, flash full update zip, TWRP .12 then Magisk. Reboot to Recovery

Install Magisk again, as active slot has switched

Reboot to System
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] anthony10126:
Yeah. I've heard so many different things about when its the rite time to install magisk.. this has been the way I've been doing it and it's worked %100 of the time.. I feel like as long as you don't reboot back into system, you should have no issues flashing magisk last. So that's what I've been doing.
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] ProudRed:
I am on .8 TWRP and planning to update to the latest OTA. So I shall reboot to TWRP Flash the latest TWRP, then immediately the latest ota, then magisk, reboot to TWRP and flash magisk again and then reboot ? Is this safe enough ?
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] dj_ooms:
You need to flash TWRP again after flashing the OTA otherwise you will not have TWRP as your recovery when you reboot. You will have the stock recovery. I would do:

TWRP -> reboot recovery -> OTA -> TWRP -> reboot recovery -> Magisk -> reboot system
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] Electric1447:
Same, help

EDIT: Somehow I fixed it, don't know how, just flashed magisk randomally till it got fixed.

EDIT 2: I think this fixed it, needed to flash magisk to both slots

EDIT 3: Seems that slot A is broken for me
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] reppi:
-12 works fine on 9.0.10. Thanks a lot!
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] mauronofrio:
You need to flash magisk after you flashed the twrp installer
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] Electric1447:
Yeah I got it working, thanks for the lighting fast reply
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] mauronofrio:
Yes, in all cases it is written also in the first post
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] Electric1447:
Slot A is dencyrpted while Slot B is enycrpted
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] kevk60:
Is it necessary to flash the new OS to both slots and what is the advantage of doing so. Also is it beneficial to leave twrp read only or read\write? thanks
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] Electric1447:
thanks thanks thnaks!!!!!
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] refedit:
If you flash TWRP installer, both slots will be decrypted, as long as you flash TWRP installer on both slots
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] Electric1447:
Back to this

Flashing magisk does nothing

EDIT: Needed to reinstall magisk :crying:
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] Aircraft800:
I was able to update with no issues. Here are the steps I followed:

I was on TWRP 3.2.3-8, rebooted to recovery,

Added 3 zips to flash, OOS 9.0.10 full update zip > TWRP 3.2.3-12 installer > Magisk v18.0 - Rebooted to recovery

Now the other partition was active, I repeated the steps:

Added 3 zips to flash, OOS 9.0.10 full update zip > TWRP 3.2.3-12 installer > Magisk v18.0, wipe cache, then reboot to system.

Now both partitions have the latest update and everything works!
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] kevk60:
Just updated and all is working well. Steps I took: booted to recovery\flashed new .12 version trwp\rebooted twrp\flashed full ota 9.0.10\wiped cache\ flashed twrp.12 version again\rebooted twrp\flashed magisk 18\rebooted system. Thanks for the input on this thread. It helps immensely and thank you to mauronofrio for the fast and excellent work!
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] byAidan:
Does anyone have stock Open Beta 1 boot img? Thanks :)
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] H4X0R46:
Thanks! It works on the beta but still doesn't ask for decryption key on my other slot running 9.0.7. Is this build not expected to work with older OOS builds? Not a huge deal if that's the case, I'll just flash the beta to both slots.
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] refedit:
did you reboot into recovery after flashing twrp installer? after this you have to install magisk and then reboot system
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] paulr24:
So I installed the new OTA but forgot to do the procedure for keeping Magisk. After the OTA it booted to the stock screen where it asks which language you would like to use (and from there you can choose to go to the bootloader, etc). Now I've tried booting to the 3.2.3-12 recovery, then installing the recovery zip, but when it reboots to the recovery it doesn't ask me for a pass code to decrypt and the device is encrypted... Any idea how I can get past this?
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] thedrizzle:
Did you install twrp on both slots? I ran into this as well, and i installed twrp on the other slot and was able to decrypt afterward.
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] TheKnux:
TWRP automatically installs itself on both slots when you flash it.
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] zymphad:
I did exactly the same. All working great including the McLaren, speaker mods changes intact.
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] LeoPosas:
Help!

Hi everyone, need a hand here...

Fastboot boot TWRP .12 then flashed TWRP .12 installer, but the issue comes after Reboot to recovery, It's show the "Unmodified System Partition" warning, and as we know, it's encrypted.

I've tried everything:

Boot TWRP > Flash TWRP > Flash Full OTA > Flash Magisk > Boot into Encrypted TWRP >> Stuck

Boot TWRP > Flash TWRP > Reboot to Recovery >> Stuck

Local Upgrade > Reboot > Stock Recovery >> Stuck

Magisk Backup > Local Upgrade > Restore images > Reboot System > Stock Recovery >> Stuck

I don't know what else to do, I really appreciate your help.
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] reaper000:
Try this:

Put full OTA, twrp installer, and magisk 18 on a USB drive.

Fastboot twrp image.

Disconnect from your computer

Insert USB drive

Flash full OTA and TWRP installer zip from USB

Remove USB drive and Reboot to TWRP

Insert USB drive and Flash magisk from USB

Remove USB and reboot to system

It will boot and reboot, then finally finish booting

Good luck!
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] LeoPosas:
I don't have any problems to flash any zip from internal storage, at least, the fastboot boot TWRP.img let me do it and it's all decrypted.

The issue it's after reboot into TWRP, it boot the encrypted one.
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] twinnfamous:
If you boot into a slot that has older security patch then new version of twrp it will do that. What I did was used old twrp to flash new update then I installed new twrp.then upon reboot everything is encrypted so I switched slots then rebooted recovery and I was in the proper slot then I flashed update again on that slot. All fixed.

Main thing is pay attention to what slot your installing to because after a update it switches
[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] Fil76:
I read that someone do a double install...why ?

Twrp itself , if i read correctly the log, install on both slots