What is the glitch?: Armor didnt take any damage
What causes the glitch?: Maybe the permissions of moderators?
How can I re-create the glitch?: Try playing as a mod a few secs and you should be able to re-create it.
How common is the glitch?: 100% so far
How many times have you seen the glitch?: 1/1

I will update this thread after the next round.
UPDATE: This time, with unenchanted armor, it does take damage. Weird.