I have a very active user that says he can’t never find anything in his private messages. He is not very computer-wise and i was sceptic, I have never had this problem but in the end I have been able to track the problem down.
If you do a search in your inbox waiting for the dropdown menu with the results everything works fine:
But the moment you hit enter (as this user always does) it always sends you to an empty page with no results:
So that’s why this user says the inbox search is not working. It is a very minor bug with no importance, I just wanted to notify it.