Although the most recent update (released sometime in the last 2 weeks) fixed the multiple crashes that I, and others, were experiencing using the mission editor, there are some new bugs and an old one that was never fixed.
I have created a mission where Russia is fighting the rest of the world. There are 3 farp's belonging to 3 different countries, each with 4 helicopters, on the blue team (all AI). When the 4 AI helicopters take off from their respective farp's, one of them then turns around and attacks their own farp will all their missiles. Then when they come into range of an allied farp they attack it, too, using all the missiles from another helicopter. I also have a Russian farp with 4 AI controlled ka-27's and the same thing happens; one of the ka-27's turns around and fires all its missiles at its own farp.
The old bug involves using Israeli ah-1 cobras. When the mission starts the 4 cobras are supposed to take off from their farp and fly to the target zone, but only 2 of them do. The other 2 stay at their farp, one hovering a few feet off the ground, the other idling on the ground.