What live TV app? Is your device a Roku TV? And is the antenna input names Live TV?
Or are you talking about something else?
If it's not a Roku TV, which device is it (to include model number: Settings > System > About)? And if that's the case, what is the name of the app and the version?
Roku Community Streaming Expert
Note: I am not a Roku employee.
If this post solves your problem please help others find this answer and click "Accept as Solution."