I can not tell you how many times I have been doing real good on a map when all of a sudden for reasons I need to pause the game for a moment. but when I come back, unless if it was during a long break there is a 99% chance I drop combo. I suggest that after unpauseing hte map rewinds maybe 10 seconds. And no not to "redo" your actions up till that moment would essentially be already locked in you would really just be ghosting to get back in the rhythm