Yep, happens to me quite a bit, I feel it's especially when I'm under more stress in my life than usual (particularly), but I'm not sure if it happens cause of stress alone, or because my sleep schedule isn't so great..

I also feel it's just my mind/body's way of waking me up when I need to change my position on the bed, or if I'm hungry, or have to go to the bathroom etc, I'll wake up with a panic attack...

it's not really a thing to be worried about though it's unpleasant.