If you experience ptsd flashbacks, does it ever leave you unable to speak or put together thoughts for a while?

I don’t think I’m talking about trauma induced selective mutism, and it’s not really dissociation I’m talking about, but dissociation often precedes this.
There’s a point after a flashback and after the complete dissociation where I’m unable to talk. But I can be completely aware and having feelings and even having a want to talk or explain myself, but I’m completely unable. I truly can’t talk if I wanted to. It can last from like half an hour to a couple hours, and sometimes I fall asleep during it. There’s also a point between where I’m able to form thoughts but still unable to speak.
Does this happen to anyone else? I’d like to know if there’s a term for it