Alright, essentially it's like this. If you hold a rocket launcher, that has no rocket in it and you open the comms menu, it switches to your primary, cancelling a potantial reload without warning, which is pretty annoying. Only rocket launchers do this as far as I know, I tested the RPG as well as the M3 MAAWS, everything is fine with normal guns. This bug is reproducible. Here's a video showcasing it. Godspeed NWI.
Opening comms menu cancels reloads