Fox Sports App not working with Spectrum credentials (Amazon Fire TV ONLY)

Got a new 50 inch 4K UHD Amazon Fire TV for my living room during Black Friday - I recognize it’s a cheaper TV but I really don’t need fancier as I don’t watch that much TV. It was $280.

I moved the 43 inch TCL Roku TV to my bedroom.

Fox Sports app accepts my credentials on that TV but the Fire TV will say “that content is not part of your TV subscription” or something to that effect. I’ve seen the same issue on Reddit. It’s very annoying….

Also I couldn’t get consistent 4K streaming over WiFi with this TV (the TCL Roku TV can), but I had an extra long Ethernet cable I’m using now and now 4K content will be consistent instead of dropping to 1080p. Why would this be the case? Cheaper parts in the Amazon TV?

Again I don’t understand this as I have spectrums ultra speed internet (500 Mbps) and nothing else is hogging bandwidth.

Regardless, I’m not sure what the issue with just the Fox Sports app is… I can view all over Spectrum content just fine on the Fire TV logged into my Spectrum account (ESPN, FXNow, TBS, TNT, ABC, etc)