coal maker bug

Issue description

the coal maker is missing from the build menu (unless you search for it in the search bar)

Reproduction steps

all saves have this bug
you dont have to do anything to get this bug
and the coal maker is just gone UNLESS you look for it in the search bar

Game version and build number

v0.7.9a b500

Operating system

Windows

There is no such bug, you're not looking well

The coal maker is in the build menu, as the screenshot in this thread shows.