I had an issue in the past and I couldn’t get what was bothering using WinMTR suggested by blizzard support to get my pc connections.
Recently I had another issue with a Microsoft Tool and they suggested me this one :
[Link removed by Moderation]
Maybe it is a better one to get what you support wanna take a look.
Sharing : Maybe complementary 
Close all running applications , Fiddler records all internet traffic in your computer, so this will limit the trace contents.
2). Start Fiddler and go to Tools > Fiddler Options
3). Click HTTPS and enable “Capture HTTPS CONNECTs” and “Decrypt HTTPS traffic”.
4). Use Ctrl+X in Fiddler to start with a clear session log.
5.) Start Battle.Net then the game to monitor.
6.) Play, Navegate then check Fiddler results
Regards,
ElChapo
Hey there!
We appreciate you taking the time to reach out with this information. Fiddler can indeed be used to collect network data, but this software is not apart of our troubleshooting arsenal as the raw data can be limited in its usefulness to troubleshoot connection-related problems.
If you are still experiencing connection-related issues, feel free to reply in this thread or submit a support ticket, and we’re happy to help isolate the underlying cause. If possible, we will just want to have you run a ‘WinMTR’ network test while the problem occurs in-game so that we can further investigate potential network-related issues between your computer and the game server. Here are the instructions:
- Download the tool from this page
- Enter the game IP into the “host” field. The IP address for our games are listed on the WinMTR instructions page
- Start the test and play the game for at least 15 minutes. Ensure the problem happens while the WinMTR tool is running.
- After recording the problem data, click “export text” and save the WinMTR file in an easy to find location.
- Once you have that made, open the file. You’ll need to copy and paste the contents of the Text document into the post, and put four Tilde (~) marks above the WinMTR. It’ll look like this:
WinMTR goes here
If you have issues pasting here, please use Pastebin and post the link (ex: Pastebin (dot) com/123456).
If you have issues with the WinMTR program or otherwise cannot catch the problem with the WinMTR tool running, please let us know and we can continue troubleshooting using alternative methods.