Production stops close to cap

[Oliver Salzburg]

I noticed that some resources stop being produced when they are close to the cap:

I can't build that last Observatory, because the last few Iron units are never produced.

[coderpatsy]

It's because your steel plants upgrade uses some of the iron your calciners make after the iron gets capped. You'll have to (temporarily) turn off your calciners if you want it to cap.

[Oliver Salzburg]

Oh, that makes sense as I've only really observed this with Iron. Thanks.