I feel you.

This is also exactly my problem in interviews, even going back to university, in any oral exams.

I'm often so stressed in those situations, that I forget the simplest stuff and any logical thinking is sheer impossible.

Recently I failed a time-based 5 hour homework, because I couldn't think and overcomplicated my approach.

It is really annoying and frustrating and overall, this made my life soo much harder and more stressful.