I’m not sure if this place is a good place to ask for help, If it’s not, simply delete it, and sorry.
I’m trying to help bring dune dynasty project (a reverse enginering project of dune 2 game) to flatpak, we get the project compile and run fine, but when we exit the game, it doesn’t work. The person maintaining it, seems to have it working with the linux subsystem for windows with ubuntu, in X11, but with Fedora & Wayland doesn’t seem to stop, I need to run a kill command or similar to get it to stop. (Black window/full-screen is always there)
Right, I did assume you have Wayland support for my previous comment…
My bad.
Anyway, if you used the same Flatpak on both Steam Deck and your other System, it doesn’t sound to me like its an issue with Flatpak itself.
Maybe related to some GNOME Shell extension or hardware/software correlation?