Thanks for the replies @kevin1
As it turns out, I don’t think NDI was a factor here… But maybe you could confirm when I explain what I discovered…
So after my post, I decided to turn on the television by itself (without using the universal remote that I use to turn everything on in rapid sequence)… The device identified as “TV” yesterday was NOT detected… Then I turned on my AV Receiver (with the television still turned on) and Sense detected the “TV” device. I turned them off, and Sense recognized the “TV” was off.
Then, I tried the reverse… I first turned the AV receiver on, and the device was NOT detected… And then I turned on the television and the “TV” device was still NOT detected.
So it seems that the ON-SEQUENCE does matter…and that the device detected by Sense is a combination of my TV and AV Receiver… And while the order matters, apparently the timing does not… My smart remote usually turns my AV components on in rapid succession (almost turning them on at the same time)… But the test of turning on the TV first, and then the receiver easily had a minute or two between my manually turning them on…