I experienced the same thing with my T! I'm glad you brought up the subject

I didn't really know how to explain it to my T, so I just told him that my memory of a few sessions seemed really distorted. I didn't go into detail with him, but he seemed really far away during one session. We were doing EMDR during another session and he was sitting right in front of me the whole time, but I somehow remember him sitting next to me on the couch for a short time (which he didn't). During that time, he had asked me to talk about a really difficult subject. The memories seem almost surreal at times, like when I see him as sitting far away it's almost like he is sitting at the end of an invisible tunnel . This is very strange. Keep me posted!