When we load it up the Mojang logo appears, then the screen turns black, then white, then it shows the loading screen. We left the Xbox One on for an hour and it still was loading. We've restarted our console and everything.

Thank you for your report!
However, this issue has been temporarily resolved as Awaiting Response

Is this still an issue in the latest version?

If it is, please be sure to include steps to reproduce the problem:

Steps to Reproduce:
1.
2.
3.

Observed Results:
(Briefly describe what happens)

Expected Results:
(Briefly describe what should happen)

If your ticket does not look like the example given here, then it's likely to be closed as incomplete.

This ticket will automatically reopen when you reply.

Quick Links:
📓 Issue Guidelines – 💬 Mojang Support – 📧 Suggestions – 📖 Minecraft Wiki

Cleaning up old tickets: This ticket had been set to 'Awaiting Response', but has not received a response from the reporter (~3 months+) so is being closed as Incomplete. If you feel this is still a valid issue then please comment, or create a new ticket following the Issue Guidelines which includes steps to reproduce the problem.

Quick Links:
📓 Issue Guidelines – 💬 Mojang Support – 📧 Suggestions – 📖 Minecraft Wiki