We went over extensive testing in another thread and found a potential repeater close to the server causing an issue for people on the east coast connecting to the US-Cental server (there are no east servers).
So you very well could be experiencing the same issue going through the same repeater. Which again isn’t something Blizzard can fix because it’s not their hardware.
You would have to keep pathping or tracert running when you get these connectivity issues to be sure though.
Just for reference:
Has some information in there you may be interested in.