I've definitely had this happen before, but I never put much thought into it. I didn't know about dissociation when this last occurred. But it is very off-putting to put it mildly. I usually open my eyes as well and look at the things around me to try and ground myself that way. You could try listening to music or a guided meditation for sleeping. It would give you something else to focus on.

I have had this happen but it is brief and usually when I wake up

It’s actually called depersonalization!

This happens to me fairly frequently! I also get the same sensation, but with time. Like something I reminded myself to do two weeks ago will come to mind for me and it will literally feel like only a minute passed. I have to use my context clues and talk myself through it to realize it’s a brain trick and not reality.