When an SMG, which can be in either the back weapon slot or inside clothing, is taken from clothing then the hotkeys used to swap to a weapon on the players back, the SMG is transferred to the back weapon slot instead of the clothing it came from. Then when the primary weapon is put away, it is instead dropped on the ground.
I understand the latest status report addresses this by planning a 'weapon dropped' animation but this is still undesirable behaviour - if the SMG comes out of a clothing slot it should preferably be returned to a clothing slot.