Mine does this, I wait it out because I noticed she's usually trying to pass gas or poop but if she's still dry after, she goes back to sleep
Following: mine does the same
My daughter does this and I realized a week or so ago that she does it right before she poops. Then she will go right back to sleep. I will still change her tho, cuz I'm not letting shit sit on my baby's lil booty. She'll go right back to sleep after the diaper change.
The first two weeks I picked my guy up every time he started to do this, I then realized he was still sleeping. He makes a ton of noises too. I use the owlet and now look at the app to see if his heart rate is still on the lower side and it’s helped me recognize patterns of when he’s actually awake.
Mine does that, and I wait it out. Mine is a crazy active sleeper. I think it's active sleeping. If they aren't crying, I try to let him self sooth back. Just my opinion.