Stuck at bonus mission 4

[KnightFandragon]

Ive had problems w/ this mission not updating as well.....The Destroy the planes on the Airfield part.....I go up there lvl the place, have the Sturmoviks bomb the guys and 30minutes later that objective is still not updated. Idk how u explain the objectives in this game not updating like they should. It happens all to often, its kinda like the mission updating is a random number generator just like TK numbers and penetration chances for tanks, yeah it is annoying for sure