Hey guys, while playing around with the new deployment mechanics I experienced, that you can't use your under barrel grenade launcher after you deployed your weapon.
It doesn't matter, if you deployed your weapon on a flat surface or on random structures.
If you deployed your weapon, you can't switch to your under barrel grenade launcher. You are only able to switch your fire mode (single - full)
Maybe it is intended, but I believe, it is a bug.