I've gotten a few different hang ups while playing. Sometimes the screen just freezes, other times my mouse or keyboard will freeze. It will get a white screen and an error report message. After I get rid of the error message window, I can log back in.... and USUALLY continue where I left off.
Problem is when it happens in PVP. Last night after the white screen of death, I couldn't log back in because my keyboard wouldn't work. I had to reboot. By the time I got back to the 2v2 it said I fled. Which I hadn't, my computer just froze. So, I had to hang around 5 minutes before I could get back into a match.
Also, an opponent fled my battle the other night and right afterwards I go the freeze. Then it made ME wait 5 minutes. I've never fled a PVP battle dead or alive. So, I find it aggrevating when I have to wait.
I know I should log them, but often I have a few minutes here and there to play so I'm scrambling to get logged back in or to keep from dying since half the time I'm in a battle when it happens. It happened most in Krockotopia in the Pyrmid but happens pretty much randomly all over the place. I've not been past Krockotopia.