[Linux] Default display not preserved

[fuzzyfuture]

I'm on Fedora 43 KDE Plasma. When I launch the game, it opens in fullscreen on my secondary monitor, rather than my primary. Here's what my display config looks like:

This is only a minor annoyance, since I can still switch to my primary monitor within osu!:

Despite this, the setting resets to the second monitor upon closing and re-opening the game. I have osu! installed via the AppImage available on the official website. I'm using a few environment variables that I added to solve tablet driver issues:

Any help with this would be greatly appreciated :-) I'm very new to Linux so I have no idea if this is a configuration issue on my end or an actual bug.