Bug with support aircrafts use of their weapons?

[Knokke]

It seems there is a bug with the selection of targets for support aircrafts, respective to the weapon they use:

an aircraft with mixed armament of cannon/machine gun will attack only with the weapon with the highest aimMaxDist score, irrespective of the weapon caliber and target it is engaging, meaning for example that a/c with 7.92mm machine guns and 37mm cannons will fire only machineguns at target if the MG have a higher aimMaxDist, and will not even fire cannon shells as the distance to target decreases. furthermore, it will fire its MG at targets he has no chances to damage whatsoever (a heavy tank)

On the other way, if both guns have the same aimMaxDist score, the plane will engage with the most appropriate weapon. In my example, a/c will fire 37mm cannon at armored targets rather than the 7.92 MG. But once the ammo store for the 37mm cannon is depleted, the a/c will keep attacking a tank with MG fire instead of switching his priority to a soft target that it can damage.

I thought that the AI was able to choose the best suited target for its weapons and ammo load (at least, tank gunners are supposed to be able to prioritize the ammo they'll use against targets). It does'nt seem to be the case in this example (unable to switch to an other target when most suited ammo load is expended).

Is it a bug, or is the AI for airplanes unable to choose targets according to ammo type?