I'm running into a similar issue with the same mission. I get the walk into Maxwell with the cinematic bars, and after the walk in, the cinematic bars don't go away, and I can't access my inventory, or map. James' speech seems to end early, after mentioning that the AAF hit us hard last night. I think he's supposed to say more than that, but I can't be sure. So far I've had this or a very similar issue every time I've started this mission, so quite repeatable on my computer at least.

Same thing here, after I finish Crossing Paths and Im at Camp Maxwell the game freezes, there is just a black screen and all I can hear is rainfall and some background noise. My character is able to use the radio but that's about it. This happens every single time, Ive tried restarting, verified game cache with steam but no dice. Its very repeatable on my computer.

Here you can find the fix (I've found it too)
http://feedback.arma3.com/view.php?id=16602&nbn=4