Hold on.
The Geezers are different. I ran into this recently with an Audere preamp.
I can't remember the exact symptom, but they (PJ) weren't working properly after the 1st installation attempt, and I ended up calling Audere. They were familiar with this issue on the Geezers.
IIRC - the Ground and Shielding are internally connected on the Geezers, so I had to use the "active pickup" modification, which is essentially adding a certain value cap in-line on the hot pickup leads for them to work properly.
I don't have enough expertise to know if is just an audere thing, or if the result would be the same with all pre-amps.
The mod worked, but in the end, I just went back to passive controls in that bass.
I also just found an older post of someone having an issue with Geezers in a shielded bass.
I don't know if they ever resolved it, but I have a feeling this might have had something to do with it.