Yes.
I was frozen, had abnormally high latency. I was in LFR queue, then it took me out.
Turns out it put me in the LFR group, they were chatting but no group was on my screen … then disconnected finally. Could not manually close the game unless I did “close program”.
That was an odd one, but i did get DC’d a while earlier, then bnet services went offline too.
Who knows!
Edit: Managed to get back in game just now and latency is back to normal levels.