Theme partially disabled after connecting external display

[e-t-l]

When I start up my computer, some colors in my custom theme are incorrect. Once I launch ThemeTool and re-apply my current theme, they get corrected. The correct colors persist even after logoff/login; it seems like it's only an issue on system start.

See updated comment below.

Below is all the debugging info I can think of. Let me know if there's anything else I can share. I only started noticing this issue around November/December 2024, so it's possible it's a conflict with a recent cumulative update. If you're going to test it out on a VM, maybe start with update KB5046633 and go forward from there?

ThemeTool:

> Version v3.0.0
> Running on 10.0.26100 flavor F
> MainDialog: is_elevated 1

Windows:

Windows 11 version 24H2 (64-bit)
OS build: 26100.2605
Stable release channel
Last cumulative update: KB5048667

[Undam]

I have the same problem with this latest version of SecureUxTheme and the latest version of UltraUXThemePatcher even after taking ownership of uxtheme.dll, uxinit.dll, themeui.dll before patching. I too only started noticing this issue in November. Right now I am sticking with UltraUXThemePatcher only because the issue seems to occur less often, granted my testing was limited with SecureUxTheme.

Windows 11 version 24H2 (64-bit)
OS build: 26100.2605
Last cumulative update: KB5048667

[e-t-l]

Update

I no longer thing it's system startup that's causing the issue, I think it's when I connect to an external display (specifically, connecting to a TV via HDMI). So now I don't even know if the issue is exclusive to Win 11 24H2 or not! Hopefully this will help with further debugging.

[e-t-l]

Confirming after further testing that the issue is reproducible when connecting an external display/tv via HDMI.

Using ThemeTool to re-apply a theme does not work UNLESS I first lock the computer and log back in. (I have the LogonUI hook installed, so presumably that hook is somehow "resetting" whatever part of the injection got corrupted.)