Disconnection during gameplay.

I experience disconnection using a variety of DB skills in major bosses such as Zakum/Czakum/Horntail/CHorntail/Pink Bean and BPQ.
These skills include Final Cut, Blade Fury and Flying Assaulter.
I've tried running it in lower quality/ Changing compatiability but to no avail.

Any solutions or suggestions?

some moves cause the game to lag, and causes diconnections.