Revive prevents armor from being damaged
Sea of Sorrow since BWE.
This might be tied to characters that have Rank 4 (Noblesse Oblige) of the Pact Commander mastery track. I’ve noticed this “bug” occurring on some occasions, but not on others. It’s unknown if this was meant to be an intended benefit of the mastery.
Yea the description a bit vague but I guess the “remove durability penalty” part means for the broken armor.
Sea of Sorrow since BWE.
Another possibility is that you are in WVW in a map that gives the Outnumbered buff. You will not have armor damaged at all while outnumbered.
I had noticed that while doing the big event at Auric Basin. I had died and someone revived me and when I went to an anvil repair it said I had no armor to be repaired. I have Pact Commander mastery completed.