I would try your luck with Microsoft/Xbox tech support. You could potentially contact one of the teams community moderators, though I’m not sure if they’d be able to get to you in s timely fashion considering their schedules.
I’m truly not sure why it would crash while attempting to check DLC or live. If anything that should be an indication of your network not communicating well with the servers. Not really a fix but to help give you an idea if it’s associated with Xbox or profiles, have you tried different profiles?
After doing a quick investigation on the matter and it seems like it still seems to be an issue, I would suggest that you post this thread here so that a developer may give you an update on this…
Hopefully this issue is resolved for you soon dude.