Hi guys, I just noticed a glitch that may be unknown.
I had paused a T2 mex which I had then upgraded using assist with engineers. The mex then "registered" as T3 (via EcoManager), yet both remained paused and did not provide any income (status of "Idle"). It could not be unpaused. I was able to destroy it and rebuild, and everything worked again, although I did not upgrade it with assisting engineers when paused as previously.
It was a practice game of mine, replay #3597302, if you'd like to see it. I made a few notes on the fly beginning a bit after 37 minutes.