[OnePlus 6 ROMs, Kernels, Recoveries, & Other Devel] castrum_doloris:
Originally, I wanted to answer a lot earlier and with logs. But unfortunately I'm quite busy right now... and I lost my logs :(

Anyway, I have been using XenonHD since the first build and it's quite stable and smooth so far. Overall I really like it.

Because I installed/flashed a few additional things, I can't always tell for sure if a bug is caused by the system/ROM itself or just a result of a third party app. (I took a bunch of logs with different setups, but I lost them as I said before. But I maybe I can help a bit nevertheless until I'm able to take new logs)

The following things occured with "XenonHD-181120-Experimental" as well as with "XenonHD-181124-Official". I'm not sure if everything is a bug, I'll just list some things I noticed:

EDIT: The issues described below were most probably caused by dirty flashing the official release over the experimental. A clean flash of the ROM fixed them (Alert Slider, Volume Buttons). Nevertheless I'll leave the original description of the issues hidden down below in case someone experiences something similar.

- the alert slider seems not to be working correctly. I can't switch to different states/profiles. (fixed by clean flash)

- EDIT: I found a theme which sets (most of) the system accents correctly, but has some other bugs. Seems to be most probably a Substratum/Theme based issue.

(When applying a Substratum-Theme the configured (system accent) colours don't appear in the (System)settings. All the icons are always grey. Only the options with a slider are themed with the desired systemaccent colour.

I tried a few different Substratum Themes to determine if it's a problem of the theme itself, but most of the time i used the open source "Default Dark Theme by SpiritCroc" , which always worked fine so far. Nothing severe though (Still exists, but seems not to be ROM related)

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- If I'm on the (unlocked) homescreen and press Vol Up/Down, it adjusts the media volume instead of the ringtone/notifications (Maybe this is intended?)

- The ("AOD")/Lift Up Display seems to be a bit unreliable. While the notification wake-up works as intended, I often need a few attempts to pick up the phone until the display shows up.

- The Privacy Guard Notification can't be disabled. Even when turned off in the settings.

The following things I already mentioned in a post last week, I repeat them for the completeness. They also don't affect the Rom itself:

- After booting up, several FCs are popping up. And occasionally while runtime too.

I took a closer look at this and I'm quite sure it's caused by XPosed and/or XPrivacyLua. But as I don't experience any big disadvantages - beside rarely crashing apps while using them - (and it's caused by XPosed and not the ROM itself), it's fine for me. I was just a bit confused and not used to such a behaviour (on HavocOS)

- With stock (LOS) Kernel, the WiFi breaks after the installation of "Viper4Android 2.6 (Forked)"

-> This can be fixed with flashing Smurf Kernel 1.6.4 (latest release for Oreo)

-> Unfortunately the spectrum app (to select different Kernelprofiles, a feature of Smurf) doesn't work on XenonHD (unsupported Kernel). This was quite a known issue in the early stages of SmurfKernel and quite all CustomRoms. If I remember correctly this is caused by some issues within ramdisk (respective the patching of it)

I will be testing further and try to deliver some logs as soon as possible. Especially the for the Viper4Android issue.