5g? Are you using mobile data? Because that isn’t sufficient for WoW. Or did you mean you’re on WiFi 5Ghz?
Every service you connect to uses a different route. This is explained in the pins at the top of the forum:
Unless there is a service outage posted on Blizzard’s Twitter, then the issue will be found on the route to the server or the local equipment.
If you want to troubleshoot, make sure to include a WinMTR test 
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