It doesn't seem to load for me?

As said, this should already be fixed since at least 2 days if you updated the mod recently. Besides that, mission always triggers finished once all players are in chopper.

We tested it now for hundreds of missions in several terrains and almost never occured this again.

Thanks for responding. If its an intermittent thing we could live with it if there was some way to manually terminate the mission. In this case we tried all loading aboard the chopper, but it didn't count that as a success (unless we had to sit in there for a certain length if time?). Is there a way to manually end the mission via Zeus?

Hey, thank you!

This is a known bug but is MOSTLY fixed since some days.
Sometimes the helo still behaves that way due Arma AI but in any way, you should be able to enter it and it counts towards success. Only reason, why you cant enter is, when the helo is flying not low enough.

I really recommened to play this mode in other maps, especialy in Gabreta which was our first version as a homage to Operation Flashpoint. The whole mode is a prototype of a mode, we make since last year in Reforger but we figured out, its really enjoyable in Arma 3 too. Especially with 5-10 players.

Btw. all maps have a ZEUS module included for the admin. This at least, helps if the Helo AI makes its own things. But ofcourse, this should appear in the first place.

Looks really good and well made, but we did run into a problem with an HVT mission. Chased down the HVT then made it to the extract. Fought off the attackers while the helo circled overhead. Finally cleared them all out and found the chopper had landed about 250m away, but still listed as "arriving". We tried getting into the chopper, re-dropping orange smoke at the extract, etc. but nothing would make it budge and we had to just abandon the mission.