Chaotic baby sleeo

Hello!

So, basically, my son is always bonking into the side of his crib. He is 5.5 months old, and so far only knows how to roll onto his tummy. He always rolls to his belly, and that's how he is preferring to sleep now. He won't stay on his back! The problem is, between the rolling and weird inch worming he does, he is always waking himself up because he smashes into the bars of the crib in his sleep. He can't actually crawl, yet, but sort of unintentionally scoots while adjusting in his sleep. So, he is always moving all over in there. No matter how often we move him back to the middle, he ends up waking up against the bars. It is very frustrating and impacting my sleep. Did anyone else's baby do this, and if so, when did they outgrow it? We've basically had this problem his whole life. When he was smaller, I swear he was break dancing in there at night. Ended up diagonal and stuff. Lol