When speed reloading some weapons such as the makarov or the uzi, two magazines drop during the reload animation.
I captured a screenshot from a video that shows this perfectly.
Isn't it weird ? Have anybody mentioned that before ? I don't think I saw anyone pointing that out, even though it always has been pretty obvious to me. I didn't bother report this as I thought that it would be corrected quickly, but the game was released and it still has that bug, so... Here I am, making this topic.