git-f0x
commented
1 month ago ~Similar behavior is also present when making a video fullscreen in maximized browsers (when browsers aren't maximized, videos full-screen properly). The letterboxing is present and it makes it hard to click the exit fullscreen and other buttons for the video. Edit: This happens in all apps that can play videos, if full-screening a video when the app is maximized.~ Edit2: Videos seem to be fixed.
When a window is full-screened, using the keyboard shortcut for maximize creates grey bars. The placement of the bars is correlated to the placement of non-autohiding panels. This also happens when a maximized window is full-screened. Opened here since it looks like some interaction between the panels and cosmic-comp, but feel free to move this to cosmic-panel if it's more relevant.