My body doesn’t break down alcohol when I’m asleep?

Hey guys, this is a weird one… at least I think so.

I recently got a BAC track and have been testing out of curiosity. Last Friday I went to bed at 10:30 pm with a .11 BAC, I woke up 8 hours later at .05

Last night I went to bed at 10 pm with a BAC of .12 and woke up at 6:30 with a BAC of .07

These before bed BAC’s are an hour after my last drink.

Last Sunday I got to a .08 watching football by 6 pm and was 0.0 at 10:15 PM

This makes no sense but I have no doubt the BAC track is accurate as I took multiple tests. Can anybody explain?