Interesting... Any idea on how that might be prevented? I have not had this issue myself.
I've updated the mission to force the helicopter to hover low via a script command, hopefully that might resolve it.

Just reminded myself that I can actually order AI to get into a vehicle via script as well, so now all units in the squad get a scripted command, where they are assigned as cargo to the heli, and then ordered to get in.

Now I restarted the mission and I'm under fire right away. Is the time of the ambush randomized? I was on my way to test the extraction again.

Okay, another restart prevented the instant ambush szenario.

Now i managed to complete this mission without any further problems.

The ambush isn't randomised, soldiers should only start walking after a certain trigger has been activated. And they all should be far away enough as to not be able to see the blufor. Interesting hwo the sandbox can break things in stupid ways like this lol. I'm amazed that's even possible, as I haven't had that happen to me in over a hundred do-overs as I was testing things.

Bohemia - "Where strange things happening is a feature since 1999"

Yep, it's the great wonder and the great curse of ArmA.

wen to to check for windmills spoke to guys then couldnt get back in the truck, no option to climb back in :@(

[SPOILERALERT] if I remember correctly there should not be much of a truck left if you checked the mills correctly ...

So I just played, but my Teamleader constantly kepps running away. We were at the way to helicopter pickup, when he (and the rest of the squad) startet walking back to the trucks for the 3rd time. I've no idea why, all enemies were dead...