Youtube progress slider not updating in full screen on mobile

Potential minor bug with Youtube videos.
When I watch a Youtube video in full screen (= no visible controls) for a while in Brave (1.9.80, Chromium 81.0.4044.138) on my Nexus 6P (Android 8.1.0) and I tap on the video to make the controls appear, the progress slider at the bottom is not updated.
If I click again to hide the controls and tap again to make them appear again, this time the progress slider position is updated.


I’ve experienced the same issue.

This wasnt a problem before. Just started happening the last two months or so, maybe a YouTube update?