I have the steam version. The main base can stll spawn on top of rock tiles, preventing the helicopters to pick up infantry from it. Same bug as in the live beta feed video it seems:
I was not a betatester, never had the game or any earlier versions before I bought it on steam.
I have made a save with it if you wish to get it for testing.
Indeed, it turns out I foolished only fixed it for half of all maps, and it still had the potential to occur on the other half. I have a proper fix that's ready to deploy, and will be in the next patch release.