Aurora R16, shuts down randomly when not in use and does not recover

I'm not sure if it's failing to recover from sleep mode, but if I leave my PC alone for too long, I return to either a restart bluescreen ("Windows failed to load") which fixes itself after a restart or an unresponsive power button.

In the latter case, more than half the time I also get the "windows failed to load" error once I get it to start again. Holding the power button for several seconds and then pressing it again usually causes it to boot up. 

This is really disappointing for a brand new system.