How, no idea. And until it`s fixed we`ll just have to live without.
If the private sector is not using all its 50%, you should be able to use what they are not using and vice versa, I think. But it seems it is a bit bugged. Sometimes doesn’t work well, but most of the times it does.
This is such a weird thing to me because after the first decade my construction queue is so full of buildings I can't tell what any of the icons are anyway.
That's because you have an Orthodox version of the game.
In 1.1.2 there was a list of all the currently constructed buildings in the top right. You could see when those textiles you queued up hours ago actually started to be built at a glance and from any screen. Opening the construction queue and finding the page which is being built is more work. The buildings on the map disappear in many mapmodes and zooms.
Ah yes that’s right, didn’t remember it. I guess I didn’t pay too much attention to it.
(Assuming you hadn't yet hit the part of the game where those icons all became an amorphous blob)
I found the one on the far right was always visible. Mouse overing the ones in the middle could also give a quick idea of where my queue was at (oh, that was the 50 silk plantations I queued up).
The devs said very large construction queues were one of the main causes for bad perf in the late game, and they were working on it. Then they removed this component that generates enormous numbers of UI elements which are always on the screen when there’s a large construction queue. I think it’s a pretty good bet the two are connected.
