Music score becomes mixed with other score error [Locked]

When I place a music score on the timeline, it will often become corrupted. By corrupted, I mean there will be segments from a different score mixed in with the original. It seems to be related to changing the length of the content of one or more video clips either manually or by ’delete and close gap’Bin the vicinity of the score. I have tried deleting the score and then placing it again, but corruption persists. It’s a show-stopper. Has anyone had this issue? and has anyone found a solution?