Importing any audio as music, both in current Steam release (v51) or most recent Itch Patreon build (v52) on linux causes the editor timeline to become unresponsive (doesn't want to play), and subsequently trying to playtest the level crashes the game with the following log:
INFO 03:07:34 Loading: scenes/loading.tscn
INFO 03:07:34 Validating act_id
INFO 03:07:34 Resetting Game Stats...
INFO 03:07:34 Loading: scenes/game.tscn
Segmentation fault (core dumped)
It also clears the data={ "song_path"} value in asset.cfg (turning it into an empty string)
Audio formats I tested:
.mp3
,
.ogg
,
.wav
Operating System tested: Arch Linux with Wayland, Pop!_OS with Wayland, Pop!_OS with x11
This issue is not present in the Windows version of the game