Hey, Sheenna!
EDIT: Please try the steps recommended by Rivetnetwork below first. A clean install of the newest Killer Network Software and drivers should help resolve the issue. See my post below for links.
We have been seeing this recently for customers that have prioritization software installed, such as Killer Networking Center. If you have Killer Networking Center please try the steps below:
- Open Killer Control Center (can be done from windows search)
- Click the settings cogwheel in the bottom left
- Disable Advanced Stream Detect
- Retest
If you still have issues, please make sure you prioritize World of Warcraft and Battle.net to 1 instead of 4 in the prioritization section.
SmartByte is another piece of software that we have noticed this issue on. I do not have the steps to resolve this for this program, sadly.
If you do not have this software, then it is likely a connection related issue outlined in the support article. Let us know if you need any help after following those steps.