NFL Sunday Ticket on Apple TV not working over WiFi, but works when plugged in via ethernet

I have a 4K Apple TV. When I launch NFL Sunday Ticket, I get this error:

"Could not load application configuration please check Internet connection and click on retry"

I have restarted, and even reset the Apple TV. One interesting note, is that I was unable to reset my Apple TV over WiFi. It errored out every time. I eventually tried plugging it in via ethernet, and that worked. I then discovered that NFL Sunday Ticket worked over ethernet, though it continues to not work over WiFi.

Other apps seem to work fine over WiFi, so I'm not sure what's going on. It seems like a potential router issue, but I'm not sure what to try next. I have restarted the router (a Linksys mesh network). Thoughts?