Oh yeah, this happens a lot! I know exactly what you're talking about. I can sail right through a session babbling about trivial stuff and not letting T get a word in edgewise. I can't seem to help it. But it's good that you're recognizing you do this in RL. I do too. I'm just hoping continuing therapy will help me be aware of this and get it under control.
Yep, it feels just like a complete waste of a session.