Strange, I don’t think this has ever occurred ... CBS Sunday morning is a series I have setup for all recordings.
This morning it did not record
It is second on the priority list and the first item on that list was not in conflict, no other recordings were scheduled for that same time
The name of the program did not change and I could not find anywhere in the app where it would show why it was not recorded (seem to recall there was a way to see that but couldn’t find it).
I then manually set it to record and it accepted and started recording it.