You might try something more gentle than a factory reset such as: remove channel, reboot Roku (not the full factory reset just the simple reset/reboot) and then (re) add the channel. (The reboot after removing is important or it will not be fully removed.)
You might also want to contact the channel developer. They might already have a fix available, or at least an explanation.
Also, listing the specific channel/app might help other people with the same problem find this thread.
