When equipping a smoke grenade to a field vest it will automatically set off. I tried with only these, not flash bangs or grenades. If you have an empty slot on your vest and pick up a smoke grenade it will automatically set off on the player’s vest. ***UPDATE:**** Hand grenades and flashbangs are having the same issue. When equipped to the grenade slot on any vest (Plate carrier, tactical vest, etc) the grenade detonates as if the player had unpinned it. This occurs both when picking them up off the ground and transferring between Inventories.