Does she roost overnight on a pole/bar or does she sleep in a nest box? I have some older girls that will go through phases of sleeping in a nest box but don't soil it and do the equivalent of a broody poop in the morning but don't show any other broody traits and spend the day like a normal chicken.
It may be that your girl is starting to think about going broody which I think is what you were hoping for from your other posts, but you will need to be vigilant with her having this problem because the long periods of inactivity and slow bowel may cause her to have recurring problems with this prolapse issue. The other thing to consider would be her diet. Too much protein can cause constipation. You might consider adding a little more oil to her diet and see if that helps short term.
It may be that your girl is starting to think about going broody which I think is what you were hoping for from your other posts, but you will need to be vigilant with her having this problem because the long periods of inactivity and slow bowel may cause her to have recurring problems with this prolapse issue. The other thing to consider would be her diet. Too much protein can cause constipation. You might consider adding a little more oil to her diet and see if that helps short term.