I captured a clip from the
Watch ESPN replay of the game, starting around 27:35 of the replay (5:15 left in the first half on the game clock).
Contrary to what the announcer said, I'm not so sure that Kadary had established himself with both feet inbound before receiving the pass back from Quincy. When I first watched the game, I thought Kadary had gotten two feet inbounds. But after re-watching the replay a couple of times, it looks like his first foot step was on the line, as you can see in this screen shot:
View attachment 195259
So maybe it's as simple as that.