Hello @Alex.K, thank you for bringing this to our attention. Have you tried deleting your cookies and cache? By any chance are you using extensions? If so, please remove all of them or one by one to see which one might be causing the issue. In case it does not work try going to brave://flags > Search 'Vulkan' > Disable Vulkan > Retest
Removed all cookies, cache, history, extensions, disabled vulcan and tried a fresh install, the issue is still there, and it happens only when fullscreen on my 3440x1440 monitor, on my 1920x1080 and 1280x1024 monitor everything is fine, fullscreen or not. And i forgot to say my specs.
GTX 1060 6gb
I5-9600KF
32gb ram
256 gb boot disk + 1tb ssd + 2tb hdd
Sorry for the long delay. Can you try disabling Hardware Acceleration in settings to see if this resolves the issue? You’ll find this in Settings --> Additional Settings --> System --> Hardware Acceleration Let us know if that helps. Regards.