FPS bug?

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why does FPS interact directly with time in program blocks in the game? The unloader issues a different number of items for a specific time, if the fps is changed. I was playing at 120 fps and noticed errors in the operation of the kinetic alloy plant. most likely, some circuits and other programs in processors will work unstable if two people have different FPS. What is the gold standard in FPS for this game?
https://youtu.be/ZM301NSF3Pw