Around 8 hours ago, my wife started playing her hardcore monk and was being consistently disconnected every 2-3 minutes. I was simultaneously playing with my own monk on my own machine with the same spec and was not having this problem, so we thought it must be a connection issue with her machine (we switched computers and my monk began having the same issue).
Eventually, however, we realized that the skill "Tempest Rush" was the cause of the disconnection issues, or at least, there was a very tight correlation. When she used Tempest Rush regularly, the disconnects came. When she didn't? No disconnects. What's more, these disconnects appeared to be occurring during Acts 2 and 3 more frequently, but almost never in 4 and only occasionally in Act 1. Possibly an issue with Tempest Rush being used against specific enemies?
MY THEORIES, UNNECESSARY TO READ: This was never a problem before, so I suppose the hotfix may have something to do with it? I've read just about every thread ever written about tempest rush bugs since the issues began, and it appears the disconnection bug is an OLD bug indeed. Perhaps the hotfix, in an attempt to reduce rubberbanding, undid another important failsafe that prevented the disconnections? Just my hypothesizing.