So, I just did CWKPQ with some friends and everything went smoothly. Up until after we killed all of the bosses. After killing the bosses (On the far left side of the CWKPQ area) we all started walking to the door to enter the bonus stage. At about half way through walking to the opposite side, most everyone crashes. Only characters who were on the very right side of the map(mules) survived into bonus. Everything else that was attacking / buffing attackers crashed upon walking to the right side of the map. No error, no stopped working. The clients just disappeared into nothing. is the last SS i got before I dcd upon walking to the right side. Some characters made it by walking very slowly 1 step at a time, but before we could go into the next room, those characters who were attackers / buffers also crashed with no error.
I've had this happen to me on the day cwkpq was released (or the day after). My whole party dced at the same time after killing the bosses while walking and we didn't get to go to bonus