I was actually in this very instance myself and I experienced the same thing. 90k error as I exited the instance followed by a 10105 error. A shame that an issue that had existed and seemingly was resolved over a year ago is still plaguing players.

I'd only assume that it's the transition from the instance server to the primal datacenter that's caused the issue, but I'm no IT.

Btw hello again Xerostrife. I was wondering if I'd see you or Nox again as a result of this.