For about 5-15 seconds, the game will freeze with no redrawing of the screen and no audio. This happens when the game is first loading and gets to the screen where it shows your three characters and prompts you to press space to spawn. However, the character portraits are usually not loaded in yet.
It also seems to happen when you are about to die, or at least in the middle of combat. In between freezes, the game runs smoothly. I think there is usually a minute or two between the freezes. I have a high end system, so it’s not just a performance problem, but a problem that the game started having. The game ran completely fine until a couple of weeks ago when an update was released. I think it was around the beginning of the month when I think Nexon Security and Dirty Bomb were updated.