Kind of glad you are seeing the same issue, so atleast it's not isolated to my specific setup.
I tried everything: different ISP, different TV Provider, location services off/on, various combinations of restart, reset, reinstall of ESPN app, etc. nothing has worked.
I'm set that it's a direct bug/issue with the ESPN App. Unfortunately ESPN Customer Care really is terrible. They are the epitome of read canned responses from out of date troubleshooting documentation. They Do not even have an ATV 4K to test with. Kept calling the app WatchESPN, but it is just ESPN on the 4K, tvOS 11.
Didn't get anywhere with them. Currently have an open tech ticket that supposedly went to a higher tier support.. just hoping for an app update at this point to fix things