The guide data definitely is not populating after a sleep / wake cycle which has now created a new problem since google pushed an update for the home screen which completely disabled a channel when it has no content.
So when the guide data expires (guessing at midnight in the U.K.) Oreo on the Shield then disables the Channel row completely and won’t allow it to be toggled back on in the menu until the app is opened and run again. Once it has new guide data it then adds the row but right at the bottom of the screen again.
I do not keep Channels (or any apps that have the google channel feature) in my favourites so it means having to open the app tray and relaunch it it and resort my home screen to get it back which is a total pain!
Can you not implement a way for it to stay completely up to date the same as it does for the native Live Channels app? Or extend the guide data to say 7 days or even just 3 so during that time I am bound to launch the app once without it disappearing from the home screen.