Mission: Fox hunt (Caza del zorro) question

[Qirajiii]

Hello, im doing campaign's third mission "fox hunt" right now and i got a question.

I have done the 1st and 2nd primary objectives of the mission but i cannot complete it because i need to kill the enemy fighters (3rd primary objective) BUT theres no enemies at the map right now, i remember i've killed those fighters, but the mission is not flagged as complete.

¿Anyone else having same issue? ¿Am i doing something wrong?

Thx in advance.