What is the Issue?
Lost 9 Durability in one go on a piece of clothing.

What steps must be taken to recreate the issue?
I do not know specifically what caused this, so this is what I was doing at the time.
I was in Battle for Taillteann II, Hard.
Soul Linked with a Sunburst Shire Lv200.
I picked up a "Popo's Shirt and Pants" with the Enchants "Fox" and "Crab", It Automatically equipped as I have nothing in my Function Slot besides a Weapon. It had 13/13 Durability, normal stats, etc.
I continued the mission as normal. Clearing the next wave of enemies. I had obtained a Huge Lucky and Big Lucky Finish in succession during this wave. I moved onto the next wave.
After dealing a Critical Hit Chain Sweep to this wave of enemies, I was alerted to Eluned's Renown being raised due to durability loss 9 times in one go. Wondering what on earth I just destroyed, I checked my inventory and discovered the Popo Shirt and Pants to now be at 4/13 Durability. The Proficiency was unusually high as well for an item I'd owned for all of 1 minute.
I do not think a Tick had passed but I had no way to check as it was during the attack animation. I continued the mission as normal and did not encounter it again.
I suspect it may have something to do with the way Chain Sweep's ability to prevent knockbacks while in use works, but I do not remember getting hit at all. One enemy did survive on deadly, but all the others died immediately, the deadly status enemy was defeated by a normal attack upon standing.

What do you expect to happen instead?
My clothing to not burst into little shreds of fabric in public.

The only visual information I can provide, including GMT(+0) Time Stamps of when the Issue happened.


Ign: Giegue
Server: Mari