Memory usage

[rusty-snake]

I'm unsure if this is a problem of 0ad, the 0ad flatpak, or flatpak.
Anyway, here's my problem: The 0ad flatpak leaves a huge memory usage after playing and exiting.

$ du -hsc $XDG_RUNTIME_DIR/.flatpak/com.play0ad.zeroad 
205M	/run/user/1000/.flatpak/com.play0ad.zeroad
205M	insgesamt
$ ls $XDG_RUNTIME_DIR/.flatpak/com.play0ad.zeroad/xdg-run/ | grep -c sdl-shared
45251

These files should either be stored on disk, or deleted afterwards.