Post-anniversary patch I've been experiencing random disconnects to the login screen. I have no net issues or experienced any lag at the time, I'm pretty sure it's not a fault on my part. (updated WZ files, internet...) It happens mostly during Krexel and attempting the Anniversary Challenge (JQ). I have had it happen in other instances but definitely not as frequent (and not 100% sure those are related) From what I've heard other people are having similar disconnections lately. (I run on a MBP Retina; late 2013 / OS X El Capitan)
Have you checked this thread?: https://royals.ms/forum/threads/connection-crashing-issues.65537/ Personally I've had issues with random disconnection issues in APQ but I followed the steps in the above mentioned thread and it solved the problems for me. It's worth checking out, if non of that works we'll look further into the issue.
For now I changed my MTU setting to 1458, however I can't reliably recreate this issue. So I will make an update in this thread if this was in fact a fix or if the random disconnects continue. Thank you
If it was related to the anniversary patch please update your files: https://royals.ms/forum/threads/patch-notes-09-06-16.68196/