Hi there!
I had the same problem some time ago with a Stingray 4 H from what i guess was something like 2003. After removing the pickup from the bass, i spotted that the bottom of the pole pieces (or better to say: the side of the pole pieces, which does not face the player's fingers) had edges which were sloped (don't know if that's the right expression). Just as one qould expect from the top of the pole pieces.
Anyway, i simply turned around the pole pieces. In my case i was able to remove and reinsert them, which took some effort. But be careful. If you have the impression that the polepieces are fixed, e.g. glued or something, into the pickup, don't force them too hard to get them out. You might risk to damage the pickup in such a case.
Moreover, you could also try to push the pole pieces a little bit deeper such that they do not extend from the cover any more.
But to be clear: Any such modifications will of course void warranty and if you're not careful, you might damage the pickup. So be careful!
Unfortunately i sold the bass in question (which i regret, of course

) So i can't post an images.
Good luck with the mod!
Markus