First, what model Roku do you have? The model number please. Roku has a bad habit of reusing the same name on different devices.
The first thing to try when a single channel is misbehaving is to remove the channel, reboot the Roku (critical step, do not skip it), and then add the channel back in.
I stress again, you must reboot the Roku before adding the channel back. Only a reboot actually removes the channel completely.
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