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.