Yesterday afternoon I started seeing this when trying to watch the Spectrum app on my AppleTV. It has a button showing “Retry”, that takes me back to the splash screen and the spinning wheel of death. I never get connected, even leaving it at that point for 20 minutes. The only way out is to return to the AppleTV Home screen.
I tried other apps and they all work so it does not appear to be a network problem.
I deleted and re-downloaded the Spectrum TV app, also no difference.