Desyncing/Disconnecting Help

Tonight as well as last night around 7-8pm Pacific, i will desync or disconnect everytime i enter Waterfall Cave. Last night it was happeneing with Cavern of Anger. SOmething about the end of the act? I dont know. It is becoming extremely frustrating. As soon as i enter Waterfall Cave, monsters do not move, i can not damage anything, teleport, use items, ect. I can still explore the remainging lvl, but can not move to the next. GLobal Chat disconnects, i cant type in chat. I have to relog. But as soon as i enter again. Same problem.

I have tried to move to European gateway, same problem. I can enter any other area and it doesnt happen. Only Waterfall Cave.

Loving the game otherwise, any advice or help plz, thnx.