I checked whether my mod for furniture and armor works correctly and decided to put a mannequin for the convenience of checking the armor. Out of boredom, I decided to quickly click the "Equip (functional)" button and it turned out that the armor was copied. I also checked on vanilla gold armor to see if the error was caused by my armor or not. it happened on linux mint 20.1 64-bit. There is no way to check for windows. I've attached a gif file with how it happens and a log.