Friends list disappeared

My entire friends list disappeared. 0/1000. It still shows people in the Squadron, Fought Together, and Blacklisted lists but, zero friends. When I right click on friends that were friends in game it gives me the option to add friend. What happened? Why did they all get deleted and removed?

sometimes it just does that, often when servers are glitching out. It generally comes back later.

And nevermind. I was waiting for it come back then went ahead and started to add them back and the list came back. Weird…