I am getting a bug where stone furnaces, assembly machines and electric mining drills are not working properly, as they produce in pulses. I do not know if any other machines have this problem, as i am in the start of the electric phase.
That is what UPS-up does. In order to save processing time, it makes the machines faster and makes them use more energy but makes them active for less of the time, which means the output and power usage averages out the same but your CPU spends less time running it. See my forum post for more details.