Good news! Tried what Wiley said, when guns started firing, pulled trigger, let go, and they stopped firing.
On the previous sortie was shooting down a plane when someone insta-killed me sent me straight to tower.
In the past always immediately towered out. Never tried pulling the trigger to see if that would stop it.
Guncrasher the mapping is good had already checked that before posting.
So there's still a problem with the game, but now I have a workaround to deal with it.
Thanks Wiley