I've had this same issue with the Ultra for years, and it's -only- happening with the Roku Channel. So I just don't watch the Roku Channel (advertisers, are you listening?). I've tried all of the recommended fixes on Roku's site without success, and I don't see where the problem has been resolved for anyone else. Hope you guys figure this out.
System:
4670RW
S/N YJ00G4968502
S/W VER 11.5.0 BUILD 4E12-46
Again, it's -only- happening with the Roku Channel. All other channels work fine.
Hello @Fzee
Thanks for posting in the Roku Community!
In some cases, removing the channel and then re-installing it may help. To ensure the process is successful, follow the steps below making sure you restart your Roku device before adding the channel again.
-Remove the channel: Highlight the channel tile on your home screen and press the Star button to open the options menu. Select Remove channel and confirm.
-Restart your Roku device: Restart the device from the settings menu. Go to Settings > System > System restart > Restart.
-Re-install the channel: After your Roku device restarts, visit the Roku Channel Store and add the channel again.
For detailed instructions, refer to this Support link: How to resolve a channel playback issue
Let us know if this works for you!
Regards,
Karla