Try removing the channel from the Roku home screen by navigating to the channel tile, pressing the * key on your remote and choosing 'Remove channel'. Then restart your device from Settings>System>System restart. Once your player starts up again, add the channel back once more.
Does this clear up the issue you are seeing? Please keep us posted what you find out.
Have you already tried removing the channel, restarting the Roku device, and then adding the channel back again? What are the steps to reproduce the issue you are seeing? What troubleshooting steps have you already taken to try to resolve the issue?
With more detailed information, we will be able to assist you further.