Hi @Caz,
Welcome back to our Community Forums! Thank you for your post and I'm very sorry to hear that you're having some issues with the TV Control App.
Can you tell us if you've tried to delete and then re-install the app to see if this can help resolve the issue?
Have you tried the app on any other devices to see if this can help as well?
Please give it a try and let us know how you get on.
Thanks!