I’m having a similar problem, but with Shatter though. Whether I’m placed in by matchmaking or just try to play it as a custom game my machine totally poops the bed and I have to do a manual cold-boot.
I haven’t tried clearing the system cache, but I have deleted and re-downloaded the pack though.
This is the first time I’ve ever had problems with DLC on any level.
Curious - which 360 are you running? I have a Launch version myself.