Hi, Selwynlaw99 Fillinlax.
Welcome and thank you for posting here in the Roku Community!
Thank you for informing us about the streaming issues you're currently experiencing on your OTA Live TV channels. We'd be happy to review this.
Firstly, could you please access the Live TV Guide icon instead of the Live TV on The Roku Channel to see if you could access and stream your OTA Live TV channels through it?
Note: If Live TV is missing, you can add it by going to Settings > TV inputs > Live TV > Set up input. If the only option you can see is Rescan, it means it has already been set up.
For reference, you may check this support article related to this: How to set up and watch live TV on your Roku TV system
Keep us posted on how it goes!
Best regards,
Carly