Is it crashing or what?

Lately it disconnects me from the server, then says it's down for maintenance. When I close the app and go back in hardly any people are there and all of them are saying how they got disconnected too. It has happened the past 2 days to me, so it must have happened more time then that the last 2 days, if this keeps happening I might be done with it, I am tired of in the middle of a game fighting a boss trying to get drops, then it crashes. I thought it was an update the first time but there wasn't one not even after, please look into this, thanks!

This one was a critical bugfix.

OK thanks!