Polyphemus Pupa Not Moving

Not spinning a cocoon isn't normal, of course. Humidity probably isn't an issue, many breeders have differing opinions about
misting cocoons during the winter, I don't mist mine. When you think about it, a cocoon is pretty much weather proof, naked
pupa that burrow are a little different, and humidity close to nature is going to be best all around.
Typically when the pupa darkens it means hatching is imminent, if the pupa has a crack it may have expired during the hatching
process, the larva may have not been in the best health if it didn't spin properly, although I've had the same thing happen
and the moth has hatched.
Moving the pupa probably didn't cause the issue. If the moth has expired it will take some time to change in weight. There is a method
some use- I call it the "kiss" test, by putting the pupa on your lips you can tell the temperature much better than with the thicker skin of a hand. Consider a digital scale, inexpensive and a decisive indicator of weight, handy for sexing and checking possible weight loss that would
indicate a drying pupa after expiring.
When pupa that normally spin cocoons don't , or a cocoon is damaged, sometimes I wrap them in a square of bath tissue, some moths won't properly
expand wings without exiting a cocoon or a facsimile.
It's normal for pupa to be frisky for months sometimes after spinning, luna will wriggle right off a table after spinning for a time until they
settle down preparing for winter, and some burrowing pupa will always respond to a mist of water. Keep at it, experience takes time, and we all
continue to learn and be surprised by something unusual.
My guess is that your pupa probably expired, the crack is a bad sign, when you look at it, you might be able to see the furry head, and if that's
the case, the moth has expired.