Window title always changed to "YouTube" with Tweaks for YouTube

[jaens]

When DeArrow is enabled, the video loads with the window title set to the video title, but after ~5s the window title changes to just "YouTube". (the page itself looks OK)

This behaviour disappears when DeArrow is disabled OR the Tweaks for YouTube extension is disabled, so it looks like to be a conflict between them.
(perhaps something to do with the "Do not autoplay" setting in the latter, or maybe not)

I can immediately reproduce this behavior by toggling the "Replace Titles" option off in DeArrow - then all open YouTube tabs lose their title.

I think "Tweaks" does not modify the window title – it would be nice if DeArrow had some elegant fallback to not break the window title in this situation (whatever the actual conflict is...).

[ajayyy]

I cannot reproduce this when having both extensions installed

[jaens]

Huh, well, I can immediately reproduce this when I enable the DeArrow extension (v. 2.1.8), so perhaps dependent on settings? (although those are mostly default...)

Settings exported from Tweaks: tweaks-for-youtube-20250917-184731.json

DeArrow settings don't seem to matter, happens even with everything turned off...

Or going deeper into the rabbit hole, YouTube's own feature flags or settings? Weird...