Anyone else having major connection issues?

I can connect perfectly fine until I enter a map with enemies in it. Then I'm given about 0 to 5 minutes or so of gameplay before all the enemies stop moving, my skills stop working then the game eventually closes without a message of any kind. I want to believe that this is my internet connection's fault though since I can sometimes stay online for hours in a map with enemies. No consistency at all, which supports an unreliable wireless connection more than a fault with Nexon's servers (not to give too much credit to Nexon's servers).