Not Tao:
I think sleep effects are actually to be expected if you are meditating frequently. I was surprised by them too when I was really "going hard" a while back, but there have been a lot of threads about sleep-related things here. A common one is seeing through the eyelids, which, is essentially a Wake Induced Lucid Dream.
This has happened to me in the past. But since you posted this I have been seeing through my eyelids again. Strange.
I'll be having a normal dream and then I'll start dreaming that I'm lying in bed. And then I'll be like, "Wait, no, I actually am in bed." And then I can just see myself lying in bed through my eye lids.
Not so different from when I meditate. It's just imagery. But it does make me wonder what's "really" going on.
Life is dream-like.