Yes, sometimes T has unintentionally said things that spun me out completely, and although she can usually bring me down off the ceiling i feel rubbish for a couple of days.
More generally, if we talk about difficult stuff, it can trigger me. T has helped me notice a delayed reaction, I seem fine in session and after, then a day or two after it gets worse...

*trigger*

I drink too much, self harm, feel low and out of control....

It's less often now, but more intense when it happens.