I was wondering if this would happen for you. I have had an early hatcher every single time. Leave it be and it will call out to its friends.
I've left that one alone, but I think the wrong end pip might have done it in. When I got up this morning, 3 more PIPS!!! And within an hour, a CCL cockerel. His sister took longer to zip. Now there are even more pips. Still no progress at all from the Marans egg from last night. And no pips on any other Marans either. Just the SFH and CCL.