Me and my brother are both experiencing the same problem, when I load up halo on my Xbox one it loads up about halfway and then takes me back to the Xbox home screen, I have spoken to Microsoft about this and they have tried everything to resolve it and still I cannot load the game
Many problems are solves temporarily when you reinstall the game, try that! The emulation of reach has quite some problems that are being worked on.
I have a similar issue, when I install the game and the map packs. But if I just install the game, it works. But that limits the maps I can play. Not cool.