I just realized I don’t stutter at all when I’m exhausted

I just realized I don’t stutter at all when I’m exhausted Does anyone else on this sub not stutter when they’re really tired? I didn’t think of this until yesterday when I was sleep deprived by 7 hours and I caught myself ‘rehearsing’ things like I normally do but I noticed I could say my usual trouble consonants like Y effortlessly and I didn’t have to rhythm my speech either. I just find it weird since I’ve only heard of the opposite happening