Bug report: behavior of fullscreen switch and watching video

Let's say someone posts a link to a YT video. Discord shows the video, I can click "play" to play it. Fine, the video is playing, Now, when I tell my window manager (more specifically, i3 on linux) to see the app on fullscreen mode, it resizes to fullscreen and I hear the sound but the video message kind of respawned. I can again click "play" to see the video, but then I have two videos running at the same time and I see only one (the voice also overlaps). So it's like there is one instance of the video message for both fullscreen mode enabled and disabled, and they can be played simultaneously (but only one is showed).