I can't access the preview group so posting my issue here.
On the xbox home screen, when I click on the 'My Apps and Games' tile.
The screen goes black and I hear the blu-ray player churn and make some noise. I happen to have a movie in there (Frozen).
After 2 seconds, the xbox initiates a hard reboot. I know this because it takes a long time to boot up. Similar to when I press the power button for 10 seconds.
After the reboot, the issue goes away. I couldn't get it to happen again.