Has anyone seen this before??

[Siobhan4n]

I’m baffled as to what is going on here?
Day 11 of incubation. Eggs in automatic incubator which turns eggs every 2 hours
Other eggs have hatched fine preciously
I’ve been checking and looking and can’t see a problem and thought these eggs were growing fine
Theres lots of moment and good vainage but half the egg is clear??
I don’t think it’s a detached air sac as sac looks good....
Any ideas anyone?
Should I carry on?

 

[HENS-and-MARES]

I don’t know, I’m new to all things related to hatching things. Is it being turned enough?

 

[Siobhan4n]

It’s in an automatic incubator which turns the eggs every 2 hours...