it would appear that you at some point keybound fire rocket (fires 1 rocket) to fire rocket salvo(fires 2 or more) you would just need to fix the keybind most likely.
I have it set for “fire rocket” and a seperate key for “fire rocket salvo” however “fire rocket” fires 1 rocket from each pod, before it only fired 1 from a single pod even if 2 were equipped
it’s at least 2 years old bug that was never addressed.
Plenty of bug reports that are ignored.
They are closed as “know issue” for more than 2 years.
You cannot say anything about gaijin, we get banned ;)