Number of shared states is different on client and server!

Received this bug on a Lich. Portaled out of Dreadnaught ACT 2 Cruel then when I went back in it crashed and keeps crashing. Any fixes?

In patch 0.4.0c I also triggered this crash. While other reports have linked the crash to zone changes with a minion in some intermediate state like moving after exceeding the maximum distance this occurred to me in the Atziri's Temple zone while just running around. It did not occur immediately after a zone change. I was using a tame beast companion PorcupineAnt.