Same here. On several devices using iOS 14.2. Apple Music crashes. But interstingly only when the device is connected to my home mesh wifi with 5 TP-Link Deco M4 access points. Crashes occure on an iPhone 11 Pro, iPhone 8 Plus, iPhone SE an iPad 10.2.
Those crashes happen when I am trying to play any song in apple music while not playing them to HomePods. Apple Music crashes seconds after hitting play.
When the device is not connected to the WiFi everything works perfectly.