Yoga and passing out

I've increased my yoga - every morning at 7am me in my living room. Extra sessions are paid for at a community hall or Pilates down the road. 

What I've noticed: I feel fitter, my flexibility is growing, my planks are longer in length of time, I feel relaxed so much that I may sit down to hang out with the kids and my eyes closed and I pass out.

This happens a lotttttt..... I'm not worried, just annoyed at the inability to go back to sleep when I wake from these spontaneous naps. 

I found this on a website: 

You’ve been waking early, crunching deadlines like a boss, and acing all kinds of tricky situations that would faze normal mortals. And then you hit that yoga mat hard, give it all you’ve got, and…pass out into a dead sleep when in the corpse pose or Shavasana. How mortifying!

It’s All Good: It’s nothing to be embarrassed about. It happens to everyone at some point or another and it’s not exactly a bad thing. Yoga is a discipline, sure, but it’s also a journey; and if you fall asleep during a restorative session that has been filled with stretching your body and working out the kinks that release stress, it’s actually a good thing.

It’s All Natural: A lot of yoga novices tend to feel embarrassed and self-conscious of the uncontrollable things their bodies do during a class. Some people cannot contain their groans and grunts when they gently push muscles that have become accustomed to sitting at desks for long hours. Others find that relaxing their physique completely means losing control over other things which result in tiny amounts of bodily fluids and gases escaping too.