Why did my Nexus 5X factory reset itself?

[AC Question]

The other day i take the phone out of my pocket to see the phone has factory reset itself. Earlier I thought it was the incorrect finger print scan (which I may have accidentally done while my hands were in the pocket on and off). However, after the reset, I tried to recreate the scenario (multiple fingerprint scan failed attempts), however, the phone does not get reset. I am super confused so as why my phone reset itself earlier.

 

[B. Diddy]

Welcome to Android Central! A full factory reset, where you had to go through the setup wizard again?

Unexpected factory resets occur sometimes, but it's always hard to determine why. Presumably some sort of catastrophic firmware glitch.