I just posted this in the bug section but I wanted to know if anyone has the same problem as me:
Blade&Soul runs fine for me (no lag, no stuttering, nothing) but as soon as I enter Koldrak Lair, my connection gets really bad. It lags so much I can't do anything and get disconnected. As soon as I'm out of Koldrak Lair, everything runs fine again.
No, my internet connection and my router are both fine. And yes, I checked.
I get the "change character disconnect" too, but right now I can't even finish Koldrak Lair with a single character. This is so frustrating!