I know the update was supposed to fix the income upgrade resetting upon leaving the screen for it, but it wasn't fixed. Mine reset immediately when I checked.
I recommend making it clear how the smelter and multiplier work. Maybe say on the menu there that manually making the plates does not use the multiplier, or something along those lines.
 "IDLE: Gravity Breakout"){kind=icon}
 "Idle Drone Miner 2"){kind=icon}