Disconnected when opening strongboxes.

I can't seem to find much info on this.
I get randomly disconnected when opening a strongbox. Doesn't happen all the time, but it does happen enough that it's getting to be a real pain.
I've kept my task manager open on another screen, and I'm not maxed on memory or processor so maybe it's HD access? Like I said, I did some google and nothing really relevant to my issue comes up.