As soon as splitting a WAV click in 7/8 (signature), it somehow rolls with one 8th for a while (I know, soundz nonsense). (Currently on 2.2.70, but seems not related to the recent updates)
When editing while transport plays, there may be sync-artifacts until preload has caught up. That is to be expected.
Thank you @musicullum ! Seems can’t repro with 2.2.73, so it’s fixed by side effect or by purpose. Will keep my eyes open (no, it wasn’t PLAY/STOP dependent. It was a simply cut an paste-d 2bars from a wav file)