Hi @MovieViewer,
Welcome to the Roku Community.
We can see that you are only experiencing the playback issue with the Apple TV channel. Have you tried to remove the channel? If you haven't tried it yet, you can remove the affected channel and re-install it.
To ensure the process is successful, restart your device before adding the channel back in. We would recommend doing this from the Settings menu by navigating to Settings > System > Power (If you do not see a Power submenu, skip to the next step.) > System restart.
For detailed instructions, refer to this Support link: How do I resolve channel playback issues?
Regards,
Nimfa