Does it really auto fail on a 1?

Let me give u this example i saw the other day. By barb is running around in cerrulean hills (CR4 slayer area accessible from market place, it's where bargain of blood is located at). Was in fury of the wild to test some things.

So i activate adrenaline, and whack a CR4 kobold. It was not a 1 roll, but the attack didnt crit. Looking at the combat log, critical confirmation rolled a 1+100something.

Think i have mid 30% fort bybass on gear+ED. So does that CR4 kobold have fortification now, or do critical confirmations just auto fail on a 1?

Another example was in a von3 epic normal xp run, where i shot a cleric type mob on a crossbow build with an adrenaline charge with tons of fort bypass. It also rolled a 1 on confirmation and didnt crit.

According to wiki critical confirmation does not auto fail on a 1. The above seems to suggest otherwise. When did this change?