Beginning day 24 egg not hatching

[PonytailsFlock]

Can someone who knows more than me help me out? I have a bantam egg that didn’t hatch. Curiosity got the best of me and I tried a float test. So what does this mean? Is my egg worth keeping in the incubator?
What if the egg spins around in the water? I waited for the water to get very still (I floated a tiny tip of a leaf so I could tell if it was just movement of the water in general) the leaf became still, the egg continued to spin, what does that mean?
It’s a porcelain d’uccle and we are on day 24. Hatching in a Brinsea mini ii with both water chambers filled up as of day 18. Started with 6 eggs, 5 hatched between day 20&21Pics were taken late day 22

 

[sourland]

Looks like a non viable egg to me. Chick likely died during the third week of incubation.

 

[PonytailsFlock]

Looks like a non viable egg to me. Chick likely died during the third week of incubation.

Dang. That makes sense because on day 18 before lockdown all 6 showed great movement. But this one particularly got kicked around quite a bit from the first 2 chicks who hatched, I wonder if that hurt her