Today I just try to give that mission (to have right to buy the X-1 Valkyrie) but all the bot appear in the sector (10 like mission tell) are just flying, no fighting and with just one shoot they disappear.
Mission have to be aborted in all cases.

I'm having similar problems with the Itani training missions. In mission 2, if I don't shoot the drone quickly, it flies off and never reappears. In both missions 2 and 3, shooting the first drone doesn't register with the tutorial, so it's impossible to continue, and it's necessary to abort.