Crashing after successful invasion/summon

This happens 100% of the time for me now. If I am invaded and kill the invader, no problem at all. However if I invade someone and kill them, before anything can pop up the game instantly crashes. It happens now when being summoned as a Blue Sentinel too.

Is anyone else experiencing this? Anything I can do to fix it? I haven't crashed from anything else and my framerate has been fine for my setup.

Settings: High

Resolution: 1600 x 900

CPU: Intel Core i7 920

GPU: Gefore GTX 680

RAM: 16 GB

HDD/SDD: SSD

OS: Windows 10

Driver Version: 364.72

Controller: PS3