Blanket question! Please help!

So my husband got my 6 month old son use to falling asleep with a blanket at night. Now anytime he falls asleep he wakes up immediately and starts screaming when we take it off him. No matter how slow we are when we take it off him or how long we leave it on him he freaks out. We can’t sleep and he can’t sleep. He likes having the blanket on his face. I guess it’s a comfort thing? So I don’t want him sleeping with a blanket. I just need ideas on what to do. We’ve tried putting him to bed without a blanket a couple times and he won’t do it. I need sleep!