I have not seen such disconnections myself, but, you may want to try something like TCPView this tells you what your applications are connected to, and you may see that DN has say 3 connections, and then when 1 drops, that's when the problem occurs. You may then report the broken server to support to have them review further.
It may take some time to track down to compare the known good vs the known bad, but I think that could be a method to start troubleshooting.
If you can give me more details, I can see if I can reproduce this locally. When does this happen? During a game? While logging in? In the menus? (all of the above?) What do you do to resolve the issue (if anything)? If you simply restart the game, does that work around the issue?