Last Lords Mineral Inquisition improvement does not seem to have an effect

[misty ledge]

In my current last lords game the mineral inquisition improvement does not seem to have an effect.

Game files are attached.

I realized the issue because the math simply does not check out, as can be seen in the following screenshots.

(1) total science is only 66/turn, but the improvement has been built
(2) population has 4 primordial last lords and 8 last lords, which should yield 4x2x8=64 science from population in this city alone.

[last timber]

I think you need the primordial pops in the same vocation as the last lord pops (i.e. the PLL and LL pops need to be in the artisan slot to get the bonus science).

[misty ledge]

indeed that works.
I guess this could be added to the description of the improvement.