Game goes bonkers after playing for some time

[861977_1452550304]

As of the latest patch, occasionally if I am playing for a long stretch of time, the game will suddenly just completely, for lack of a better term, ❤ ❤ ❤ ❤ a brick. It lags so badly that even the ping meter can't even tell me my ping. Events in game come in spurts, with a few mobs running and some attacks going off followed by 10s of seconds of nothing moving. I can't see anyone else moving and nobody can see me moving. This exact same thing has happened to another friend of mine as well. My roomate playing at the exact same time has 0 connection issues while this is happening, and restarting the client gets rid of it immediately, so I strongly suspect this is not a connection issue on my end.