I have same issue using Apple TV client. However, Guide data does appear in the quick guide thing when you press down on the remote. Sometimes it is the opposite, where quick guide is blank and regular guide data is populated. I usually reboot the Apple TV to solve it.
Edit - let me add that I notice this with Pluto TV guide data that normally only goes out for about 12hrs. And the problem occurs more often than 1 wk.
Edit Edit - Even though, right now, no guide data shown in either the full guide or the quick guide for Pluto TV, when I tune to something I have already recorded, it still prompts to watch from library or live.
And for my OTA channels, right now I have guide data in the normal guide but not the quick guide.