I'm running version 2023.05.19.2045 on an M1 Mac mini. I have several virtual channels set up which previously worked fine. Today they wouldn't play on AppleTV or from the Guide in Safari.
On AppleTV I received an error message when trying to play the virtual channel. I'm afraid I rebooted ChannelsDVR and neglected to take a screen shot. After the reboot, the episode plays fine on the AppleTV.
On Safari on the Mac mini running Channels DVR, The play button was missing from this screen both before and after the reboot:
If I go into Library -> TV Shows on the Mac mini, I can find the same episode as above and play it just fine.
