Thanks for getting back to me.
Sometimes the heart beating, megaphone or blue man pointing would stop. The pink ones seem to loop fine but I think I did them by going back to the start of the timeline not reversing it from the end.
It is inconsistent and sometimes one or another don’t stop. It seems to be after a couple of cycles. It effects the ones that use reverse. I have a feeling that it is to do with me nesting symbols within symbols. Possibly timeline actions from one symbol effecting another?
I’ve been producing a similar animation and moving a looping symbol that stop up to the top level main timeline makes it loop no problem.
Both Safari and chrome mac seem to display this behaviour.
I’ll change both to ‘continue timeline’ as I think I may have some as ‘start timeline’.