In "Rix Road", the moment that struck me was when Cassian was hiding in the attic of that building overlooking the square. A breeze blew through, and it looked like something resonated with him.
Regarding where precisely to find Bix? Maybe. But watch the scene again. Specifically at 29:33. Look at Cassian and Bix.
I think this scene was just Cassian's awakening to his larger potential and change of heart about switching from a self interested mercenary to being an active part of the Rebellion. Pulling back to about 27 minutes you can see Cassian spotting Luthen and then later spots Dedre (he only recognizes her as an ISB officer). The wind is a nice movie effect that shows realization of something critical. He realizes these people are here for him and that he and the rebellion has become a bit of a big deal, and that he can have a much larger impact than he realized.
Whatever plan he had gets changed in this moment and he leaves the attic.
Maybe there is more about force sensitivity there, but I think its just a regular man realizing he has a much larger role to play in the universe and he needs to get moving. I think Bix is just a small part that helps show Cassian's compassion for his friends.
In this scene there is a little bit of a parallel with Luthen as well. I think he thought going to Ferrix would be a straightforward assassination of Cassian and that this was a fairly unimportant backwater world, but multiple cuts to him show his reactions to the upwelling of rebellion on Ferrix, and the people that are assembled to capture/kill Cassian. He recognizes Syril and his security buddy. He sees Dedra. And at each step you can see him doing the mental math about all the people assembled to get Cassian and how Cassian is maybe a bigger deal than he realized. And when the fighting starts he realizes this is probably exactly what he wants - its messy and out of control and he decides his work of Ferrix is done for now.
Either way, these four minutes of Cassian's awakening is an awesome scene and really the climax of the whole series.