Hello. Can you tell me who had this experience? In general, we had an …

Hello. Can you tell me who had this experience? In general, we had an ideal regime for a year, going to bed early and so on. But after a year, something went wrong. If earlier somehow at least by 10:30 PM I fell asleep, then now it can be even up to 12:00 AM. And then fall asleep until 1:30 AM and then sleep until 11:00 AM. It doesn't want to switch from one nap to another, no matter how late they put him down, he sleeps exactly two naps and then goes to bed. Now he wakes up in 10-11 AM first nap at 12:30