Title says it all, it all started happening randomly and i'm not quite sure how to fix it.
I've tried updating drivers and re-installing the game.
Re-installing caused a temporary fix, but it started up again about an hour later.
PC specs:
i5-4690k
16GB RAM
Asus Strix GTX970 Video Card
Does the game hang and the window grey out or does it just stop responding to controls? If the game is responsive enough could you please submit a bug report? Even if you have to restart the game the bug report will still capture the last time the game was launched. You can make a bug report by pressing F2 or by using the /bug chat command.
The same happens with me, but this happens when i force close the client and reopen it, it never connects, due to which i have lost many bosses. And this has been around for a long time.
Would you provide documentaion of what the game client is doing?