[7.4 Groud combat] If you have 2 secondary items, you can only use the one you had in your seondary slot to start with

[Max_Caine]

Fiarly simple to reproduce.

1) Before a mission, equip two secondary items - I equipped a medpack and a smg. Place the medpack in the secondary slot and the smg in the backpack

2) During a mission, swap the medpack for the smg (in my case) around so the smg is in the secondary slot. You will find you cannot use the smg, but if you swap back, you can use the medpack. 

[Chris]

Thanks. It looks like the fundamental problem is that weapons that are placed in the backpack do not automatically have ammo attached to them, which means equipping a pistol requires you to reload it from the belt before you can use it. I'll have a chat to the team about what's going on there.