Here's a better angle. Arcidiacano gets him twice. Could have called a foul on Bridges as well.
I will admit Arcidiacano probably got him on that second swing, but the way he was angled the ref could not see him, it looks like. Not saying that makes it okay, or defending it, but they're humans and can't see things some times. As for Bridges, he definitely hit a lot of ball there and if the ref on the close side of the court called that there would have been even more chaos.