Judging by my recordings for the day, this happened literally today, at some point between 1:30 - 2:00 PM CST.
https://www.rabbitears.info/market.php?request=atsc3
Both of these stations are owned by Fox, and if some of the other recent posts in this thread are any indication, I suspect that all Fox owned stations will soon be switching on Encryption if they haven't already, very likely as a requirement for broadcasting the upcoming Stupor Bowel.
Again, I'm looking at the other comments, and I should count myself lucky that I still have access to as many channels as I do, but I feel like it's only a matter of time before they all give me the proverbial middle finger by switching on Encryption.
And even with my successful recordings, I feel like I've been thrown back into the early 2000s with my struggle to find an Audio Codec for Dolby AC-4 so I can even hear their "higher quality" sound.
Basically, at this point, ATSC 3.0 is just a joke. I laugh out loud every time I hear "NextGen TV" being advertised, and literally shout back at the TV Screen "Good luck being able to watch it!"
EDIT: The glorious irony of this situation is that, back when I had started using SD HDHR Tuners almost a decade ago now, I had always been prepared for my cable provider, Xfinity Comcast, to someday flip the encryption switch on the majority of my cable channels that I get through my trusty HDHR CC-3. Back then, not even in my wildest dreams could I have imagined Antenna TV beating them to the punch on the Encryption front!