Me in BER airport months ago, during the security check:

The male security staff said "you can go there", pointing a woman staff.

The female security staff said hello, and then had a moment, then said "are you a woman or a man"?

This is an unanswerable question as I'm nonbinary. I said I'm trans.

The staff said "then you are a man" and called the male staff.

He was very confused and double checked he could actually proceed. I said ok just go on quick, fearing a potential refusal.