Thank you for posting here in the Roku Community, @Bliff!
We appreciate you reaching out for support regarding this matter. No worries! We're here to find you the best resolution possible.
Before proceeding, we'd like to know what is your current OS version. (Settings > System > About) Also, when did you first observe this issue started happening and how many channels have you installed on your Sharp Roku TV?
In the meantime, we could try one more step, and with your permission, we can perform a hard reset on your TV. Please be informed that resetting your Sharp Roku TV will set you back to default settings, and you may need to re-link your Roku account and sign in on your channel subscriptions. Also, before doing this step, ensure you know your network connection's name and password.
Let us know how it goes! We'll be waiting for your update.
Best regards,
Carly
Carly Y.
Roku Community Moderator