On my second non-primary monitor, the screen goes black whenever I open a fullscreen media. It comes back to normal when I close it with ESC or click or alt+tab to something on the other screen.
Applications where this happens:
- Spectacle rectangular select
- Telegram media
- MPV videos
- Okular
- Chromium videos – they blink during playback, goes dark if paused
- Firefox videos – this one is a little better; it plays fine but blinks for a second when exiting fullscreen
There are some instances where this bug does not happen, like playing a browser video (running, not fullscreen) and opening a telegram media. However the bug still triggers with a MPV video + telegram media, and many other “combinations”.