I haven't seen issues with the particular files I'm using in raylib yet, but I do believe there's a few `known issues` with jar_xm. In my experience, support for any mod file format in any player has been finicky. VLC for some reason seems to have issues with some .xm volume levels, I've had issues with other trackers and libraries as well in the past.
I imagine the most 100% bulletproof playback strategies would be:
1. Render to wav
2. Use the exact library used by the tracker your mod originates from, and use it's output via raylib's AudioStream api