Mom, help! I don't understand what's wrong with the baby's schedule. ...

Mom, help! I don't understand what's wrong with the baby's schedule. He is almost 9 months old and has been sleeping poorly for several days in a row. We have two naps during the day that he sleeps well without any problems (from 1 hour to 2.5). At night, we put him down as usual, he falls asleep without problems. Literally half an hour passes, he wakes up and starts laughing, playing. He rubs his eyes, yawns; I can't put him back to sleep. Naturally, he has to go to the potty and wait until he plays around, and that's how he sleeps in short bursts all night. Does anyone else experience