Rossks
Are you sure you are selecting the correct "Live TV"?
Do not select Live TV from the left side menu. (those are streaming channels).
Select the Live TV "Input" icon that is on the Home Screen. Better yet, go to Settings/TV Inputs/Rename and rename this Input to "Antenna TV". Then look for the "Antenna TV" Input on your Home Screen so as to distinguish it from everything else Roku calls Live TV.
If you want to see just the Antenna Channels and no Streaming Channels when selecting the Antenna TV Input, you can "Hide" them from Settings/TV Inputs/Manage Channels/Hide Streaming Channels.