How do I resolve Apple Music app glitches and unexpected closures on Macbook Air

Has anyone else been having a lot of problems with Apple Music lately (like the last several months)? I run a dance studio, so I constantly have to use music, music files, purchase music, upload music, download music, etc. I have had several custom tracks made with Garage Band that I've tried to play on my Macbook Air and it's getting more and more glitchy. The latest glitches (over the last couple days), I'll add a track to a playlist and Music will just close and then give me an error message saying that the unexpected close will be reported to Apple and ask if I'd like to reopen the app. Also, I'll click play on a song and a completely different track (on the same playlist) will start playing instead. I've made sure everything (Macbook, Music app, Garage Band) is up to date. I've tried forcing a close and restarting. I've restarted the Macbook multiple times. Just seems to be getting worse and it's getting extremely frustrating.

[Re-Titled By Moderator]