I do know of cases where a band split up, then the various members formed new bands and each claimed the song. Roger Waters e.g. left the band and tried to stop

I do know of cases where a band split up, then the various members formed new bands and each claimed the song. Roger Waters e.g. left the band and tried to stop the remaining members from using the name Pink Floyd. It was a bit of a legal mess. Waters still plays Pink Floyd songs.