Some of us were having this problem a few weeks ago. It's a problem with patching on demand. The map will crash the first time cause there's some problem in downloading it. It'll be find the second time cause It's already downloaded. I know it happens with the defiant bridge/interior as well. It should work every time now. Barring that, if you turn off on-demand patching, it should work every time, though you'll have to spend some time downloading the whole game.
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