I had a similar issue!
When I got my first glider I went out and bought some lounging pouch for him, it was fleece but had an outer layer made of something smoother.
Well one day I'm looking for him and I'm freaking out cause I can't find him, so I take out the pouch and feel that it's heavy, but I don't see him!
He had somehow buried inbetween the two layers and was (as Candy said) happily sleeping in their warm little hole.
Needless to say I immediately cut him out of there and retired the pouch.
I prefer the pouches that are just one layer now, for my own piece of mind. Haha.