I think I've had something similar a number of times, like daydreaming while another part of me is disengaged, although in my case not really observing in any a

I think I've had something similar a number of times, like daydreaming while another part of me is disengaged, although in my case not really observing in any active sense just half asleep in a different way :/. I think this may be related to altered thalamus activity (less relaying) during sleep and meditation.