Leviathan DLC final cutscene not triggering

So I have all the DLC for ME3, and I have played Leviathan before with no problems. I haven’t run into this issue with any other ending cutscenes so far, so I have no idea what could be causing this. 

I finish the DLC normally, talk to Leviathan, have the scene at the end with me and my squad in the shuttle as normal where Ann Bryson mentions Hackett asking her to join the Crucible. But then, instead of Hackett’s debrief, it sends me to a glitchy version of Normandy. I can’t activate the communication thing to contact Hackett, since that’s supposed to happen automatically. The war room is completely dark, and there’s no one else around except for EDI, who won’t talk to me. The elevator is missing, I can’t access it, and if I try to walk into it, I just fall through to out of bounds and land on top of the Normandy. I’m stuck on a glitchy, empty CIC, and while I can access the galaxy map, trying to begin another quest (in my case, Priority: Thessia) just breaks the game since the cutscene that starts that mission won’t start either, and I’m again stuck on an empty CIC with only EDI who won’t talk to me. 

As best I can figure, this is an alternate version of the Normandy that plays in the background when you’re talking to Hackett/Anderson, but I have no idea how to trigger that conversation or how to get back to the normal Normandy. As it is, I can’t finish Leviathan DLC because it completely glitches the Normandy out at the end. 

Can anyone help?