Wondering if anyone else has run into this. I use my cable provider - xfinity - to sign in to a number of apps on my Apple TV's. I have a 4K, and the previous generation ATV. Both are updated to the latest OS, but this has been happening for months regardless of update. I have my TV provider logged in to both, always allow the apps to share the log in, but I still have to re-authorize each app at least once per week. I can't seem to find any pattern or reason for it, but it is getting really frustrating.