Cognitive Impairment is a real thing.
I have suffered from it myself on many occasions.
However, when I tried to use it as an excuse for my piss poor performance, my boss insisted that in fact, I had simply made a mess of what I was doing because I wasn't paying attention/ trying hard enough/ was thinking about something else/ forgotten what I was supposed to do..etc.
CI my ass.
AH clearly made a balls of the manoeuver, probably because he thought for a moment he was in the JP.
Whether it was confusion with his other type, or something else though, isn't the issue.
He simply made a mess of the manoeuvre, and as the aircraft Captain he should fess up and admit his mistake- as we all have to do from time to time.