Not sure if this is a MM bug or a Mission bug - happened when I joined a game

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I guess the game was trying to put me close to my squadmates, but it spawned me under a staircase that had no way back into the rest of the level. It was compleetely closed off but I managed to clip through the ceiling to get into the rest of the level by abusing Excalibur's Super Jump.

http://imgur.com/a/YZ6JC#0

I uploaded a gallery of it. Ignore the first picture with the door, that was an accidental picture, lol. I don't know if that's a bug. Anyway I filed this under matchmaking because the MM system put me under there.