Nothing has changed in my station. Is something different with the DUV signals of the satellites, or with the program, or some screwy Windows update, or something else that I'm missing? Anyone else seeing the same?

This is typical (at least for me). I've been running a dedicated FoxTelem station (FCDP+ and a Raspberry Pi, 3/4 wave ground plane attic antenna) for a couple of years and I've noticed that I can go for weeks only getting about 20 to 50 frames a day, the all of a sudden I'll average 200 frames a day for a couple of weeks. The running average seems to be about 50 frames a day.

Of course, there could also be a recent issue with one of the satellites or your station.... who knows. Just giving you another data point.

--Roy K3RLD