Yeah, that's enabled, but the system never lost power, or even shut down for that matter. Basically Fallout 4 just exited and dumped me on the home screen due to a low memory error or something similar. On PC if an application freezes, you can just close it without any issues (then just take the hint and let the computer do its thing), but I'm not sure if it's a serious problem on the Xbox One or just a minor nuisance.