If I'm stuck in a social situation or a conversation while getting social burnout, and not feeling relaxed, I will start to not be able to make the connections between what someone says in regard to what either of us have just been talking about.
For example, we might be talking about the weather and they will say it's a nice day, but I'll say it feels a bit chilly for me, then they might say something else, then come back to the weather and say "So was yesterday more like warmer for you?"
And I will completely blank and think it's a non-sequitur, and wonder why they're asking me that -- even though it was not long ago that we were discussing weather and temperature. I do this all the time when not entirely relaxed -- fail to put together connections in the conversation. I even do it for movies too -- fail to understand why something is being said or is happening in relation to what we've already been shown or told as a reason why.
I guess it's a lot to do with short term memories not getting "laid down" when under stress, but this is like really short term stuff!