I'm relatively new to the ATV experience, but I'm having an odd issue on my Mi Box S. There are certain entries in the Play Next channel that I can't permanently remove. If I long click on them, I can remove them, but they reappear after a while.
I suspect that the issue has to do with removing the last entry from a source, as I can remove other entries, just not the last. So for example, I can't permanently remove the last entry from HBO or Tubi. It's not exactly an earth shaking bug, but it's annoying and I was wondering if anyone else had encountered it and perhaps found a solution.
Go to "Settings -> Apps -> TV Storage", try to clear its data. It should remove everything under Play Next. But it will also remove all home screen channels.