Bug - bot parts resource counter works only with Quantity value, not Percentage

The resource counter Percentage isn't calculated correctly.

In my scenario; I have 15 bot parts factories (divided in limbs; chassis; heads)
I automated each based on Quantity (count); then I decided to switch to %: After that; my automation stopped as expected.

I have no storage for bot parts. I only rely on the factory's stock.
I checked my factories, most of them are full; waiting.
I checked the resource Quantity; it matches the inventory.
But if I switch to Percentage (in the resource counter) it shows only 1-7% (where I expect 100%, as all my factories are almost full)

I have 5 Limbs factories. 12*5 = 60. No additional storage.
If I set my resource counter to Quantity: it shows 55, that is correct.
If I set my resource counter to Percentage; it shows 7%; that is not correct.