When reviewing a game using chronocam after the match ended, I usually notice that when i hover my mouse over a metal extraction spot with an advanced mex, the basic mex is still underneath. So depending on mouse position, it will display either "Metal extractor" or "Advanced metal extractor". Its probably a problem with the replacement of a basic mex with an advanced one not erasing the basic one from the game when it comes to the recording.
Actually, this is expected behavior- you build the advanced mex on top of the basic, and they both remain. Their models are actually designed to overlap.
