I was testing out the quality of my videos on OBS studio when I discovered this issue. I noticed this issue only because of a strange double effect in my videos. (2 photos are added as attachments. One shows the double effect in OBS studio [2024-04-25 205303-1] while the other shows it in the gamer's perspective with some elements such as the version number slightly cut off.)

When I open Minecraft, it opens at 3840x2160p as usual. However, it decreases slightly when the game exits and re-enters fullscreen. By using OBS studio and some basic math, I figured out the resolution decreases to 3799x2137p.

I know this is a small bug, but by patching it, that would prevent some confusion in the future for any streamers, YouTubers, etc.

Edit: The double effect happens because there's one source in OBS recording just the game and another source that records everything on the computer. So I removed the one for just the game and the double effect problem is solved. Whether this bug is eventually fixed fully or not, It won't be nearly as big of a problem now.