That's unusual. If 'Create New Lanes on Overlap' is enabled, CbB should put the whole new take in a new lane. I played around, and was unable to make it do otherwise, regardless of where a 'stub' from a previously aborted take started and ended.
But if you don't intend to keep partial takes, you can just Ctrl-Z to undo the aborted recording, which will delete the partially recorded lane and heal the splits in previous takes.