Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
Just checked it on my Ultra 4670 and everything looks fine. When you removed the Prime channel, did you reboot the TV before installing again? And I don't mean just turning the TV off and on. You either need to use the system restart option in the menu or pull the power for 20 seconds or so.
Dan Roku Stick (3600), Ultra (4640), Ultra (4670), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.