Oh yes, I've had that. One time I left session and I felt something was wrong. The session seemed to go well but I still had a nagging feeling.

Later on, I got a flash that 'she wasn't there'. I left a message with her and asked her if she was there during the session. That was the only way I could express it.

We talked about it next session and she agreed that she found herself emotionally aloof. And we discovered that she was unintentionally responding to my own aloofness.

That is what is called limbic resonance.

I would find it quite worrisome if your T is not interested in exploring your feelings about that. My T constantly asks me how I'm feeling and trying to help me work through them.