Thanks for reaching out here in Roku Community.
We're sorry to hear about the issue you are experiencing with the channels on your Roku device. To troubleshoot streaming channel issues, check your network connection status by going to Settings > Network > About. If your Roku device is connected, perform a network and internet connection test by selecting Check connection. For help understanding the test results, refer to the detailed article on connection check.
If the playback issue continues, restart your router and your Roku device using the Settings menu (Settings> System> System restart).
To help troubleshoot the issue further, follow this link: How to resolve a channel playback issue
Keep us posted on how it goes.