This just started happening for me today. It seems to only pop up when I'm in a dungeon which is odd because I ran my dailies yesterday with no issues.

I haven't had any updates to windows in the past 24 hours or updates to anything else pop up. I'm just fine outside of dungeons but a minute or two after I enter a dungeon (daily, random, or explore) I get hit with

https://puu.sh/HBrqf/fbc9379fbe.png