Solly wrap fit check/troubleshooting

My 5 week old is 22” and 11 lbs. when he’s sleeping, i can wear him in the solly wrap with his head tucked in as in the first pic. When he’s awake, he constantly throws his head back as in the second. (Photos from two separate occasions).

I’ve tried both tightening and loosening the wrap. He will cry and fight out of the wrap if he has his head tucked in while awake. Is there something wrong with my fit?