So I was making a small setup to partially automate ceramic and refined carbon production, and I found an exploit of sorts, I think.
I selected a single Kiln to produce refined carbon out of coal, then I copied the settings of that Kiln to the others.
In less than a cycle, I had enough refined carbon, so I cancelled the prodution on the Kiln on the right, and copied the settings to the others on the left.
To my surprise, the production halted on all of them, but in the Kilns that I "turned off" with the "copy settings" function, the heat production did not cease, and the coal in them was not being consumed.
It wasn't only the heat production tooltip that did not disappear, the Kilns were still doing the active animation, and heat was indeed being produced.
Steps to Reproduce
Disable Kilns' production by using the "copy settings" command
This issue has been fixed in either a future version or updated in a previous version.