Rolling at night

Anyone else’s 4mo roll over at night in the crib and fall asleep? My lo has been rolling for a month but she’s just really started rolling at night. We put her down on her back but she rolls over to her tummy either right away or in between sleep cycles. We try to roll her back but she just goes right back to her tummy. She sleeps pretty well on her tummy too. We have a PED appointment in a few days so I’ll ask if it’s okay to leave her then but just wondering if anyone else is experiencing this.