Are you using YouTube music purely for new suggestions?
If not, and you have your own curated playlists, you could consider NewPipe (or the fork called Tubular) as it allows you to play these in the background, and even add songs from SoundCloud and Bandcamp into the same playlist.
What device do you have? These apps could just be crashing because YouTube detected it temporarily blocked access; happens all the time with yt-dlp, Piped, and NewPipe