Torpedo Bug in Naval Missions

There is a Bug in the Game.
In Naval Missions, I can´t drop any Torpedo, when the Secondary Weapon selection is activated.
The Torp can only be dropped, when I keep my fingers from the WepSel-Button.
But in case when I wanna play with the Wyvern with Combined Torpedo-Rockets i can´t drop the Torpedo when it was selected by Secondary Weapon selection.