I’ve been having issues with Halo 5 randomly crashing after matches since the Hog Wild update. I’m not sure what’s causing it, but it’s usually right after I press “Y”. It’s also been periodically happening after opening REQ packs, which is annoying, because I don’t get to see everything that I got, and I usually have to restart my XBox to get Halo 5 to launch again. Now, this is inconvenient, but I’m sure that there’s something being done about it. However, it became a problem earlier today when I didn’t receive my Daily Warzone Win Pack. The game crashed after I pressed “Y” to go to open the pack, and despite having received credit for the win, I haven’t seen it, even after a hard reset and subsequent wins.
Of course, it isn’t that big of a deal, but it is frustrating. I just thought that I’d let 343i know that there was an issue.
So, I figured out that I could avoid crashes after pressing “Y” by backing out to the main title screen first. It’s inconvenient, but not nearly as annoying as relaunching the game/resetting my XBox.
Hey, so, I think that this issue has been addressed and patched. Thanks 343i.
I think that the issue may have returned, though it could’ve been a fluke.
There have been some issues with the REQ system over the last 24 hours - like due to traffic increase. Try hard resetting your console and see if that helps. Alternatively you can open packs from here on Waypoint 
https://www.halowaypoint.com/en-us/games/halo-5-guardians/xbox-one/requisitions/categories/customization?ownedOnly=False
Oh, I guess that I should’ve specified: it was after I pressed “Y” when I had just finished a match of Warzone Firefight. Luckily, I haven’t experienced crashes while opening REQ packs for a while now.
Thank you for your timely response.