I don't think that this is true. For example, I have a app and current subscription to Netflix and I see the 'Remove Channel' option here. So why can't I remove F1 and reinstall?
Cancel your subscription to F1 app at Roku. (It doesn't actually cancel until your billing cycle is up). Once you cancel, you ca remove and re-install the channel...but fun fact, that doesn't fix it anyway.
I just FACTORY RESET my Ultra HD, and even that didn't fix it.