Nighttime sleep and naps?

A

Hi all

My son sleeps from 8pm-4am, has a bottle and quick diaper change and then back to bed until about 830 or 9 am. So he gets about 12 hours each night. His daytime awake window is usually about 3 hours before he needs a nap. I put him down to sleep usually around noon. Lately he’s been napping a long time. I put him down at noon today and he’s still sleeping (230)

My question is, would you let him nap 3 hours and then go wake him up or would you let him nap until he wakes himself?

I’ve noticed that he tends to sleep more when he’s teething and he’s currently cutting his 4th tooth