I think that it was his human side, which is bound to show itself sooner or later. I can't tell by your post how concerned you are about this, because in some of what you wrote, you use your humor, and other things make it seem like you are really worried about this. If you are really worried, I would talk to him about this next session and ask him if he felt annoyed or whatever. Especially since you said this was something you experienced with T1. Because you said that, I think it would help you to discuss it with him. Or is this something you don't feel comfortable doing?