There was always a little bit of overlap of the bridge and the bridge pickup with the 60s-70s harp style bridge.
When I had my JS-2 bass I played around with the bisonic pole orientation of both pickups and found that flipping them around gave almost an inch of difference in the position of the pole placement, so the tone was notably different, especially when blending the two pickups together. I found that I liked the original factory orientation best. The tone was just bigger to my ears. But then I've never really liked pickups super close to the bridge. I've never heard of any starfires leaving the factory with either pickup oriented toward the bridge like that, though it certainly seems possible that it could have accidentally happened. Maybe Hans would know more on the topic?
In any case, it's important to consider that the alembic superfilters make blending the pickups a whole different game, so having the bridge pickup flipped in that context would probably yield a different kind of tonal flexibility. I noticed in the photo that I used for the youtube clip, it looks like Jack had both pickups flipped toward the bridge. Then when you look at the R&R Hall of Fame photo, only the neck pickup has been flipped back to its original position.