I'd say to try to swap the front wheel speed sensors to see if the issue is with the hub or the sensor. You could switch hubs instead, but that would take more time.
I have a thread dealing with wheel speed sensors too:
https://www.ft86club.com/forums/show...69#post3441369. Believe I posted a link to a video showing how they work (magnetic induction). In my case, it ended up being the wheel bearing and not the sensor.