Dear Opera-Team, can you confirm that YouTube seems to have some kind of "overlay-display"-problem when clicking on the notification window on the right? A video must be playing or being paused (ideally something with lots of dark or grey areas). When you toggle the notification bell or click the video settings wheel, the video window flickers. Seems to be a mismatch with the video black levels. By clicking it seems to get to "16-235"-levels, than instantly reverts back to normal full levels "0-255". Everything while HDR is turned on in Windows 11 (24H2, up to date version). NVIDIA graphics card (RTX 4070 Ti Super) with up to date drivers. Color settings in NVCP are set to "accurate".
This behaviour only occurs with "Choose ANGLE graphics backend" set to Default respectively D3D11. D3D11on12 is kind of unstable and the whole screen becomes white and flickers from time to time. It's only fixed when choosing OpenGL oder D3D9. Then you can click the YouTube notification bell on the right (while any video in the main window area is paused) and nothing flickers, the video itself stays as it is and does not change black levels. I guess some kind of overlay problem.
Can you reproduce this and if so, do you have any clue why it is this strange?
Enclosed you find a small GIF illustrating this (it is amplified because of D3D11 angle flag - in real it's a small flickering of black levels, blacks become greyish and then instantly black again... after around 0.5 seconds)