Armour Disappearing Mid Map

I noticed my armour piece was suddenly gone after finishing a map and opening my inventory. I am 99.99% certain I did not touch it because I literally have no reason to, and I have 0 reason to sell it. I am pretty cautious when it comes to selling items as well so I am pretty certain I did not sell it but I dont want to say this is a bug if, I did happen to f(_)ck it up. If someone is able to check my account somehow, it was "The Coming Calamity Heroic Armour" at 34% all res, 90 or 91% herald damage, twice corrupted with 14% recouped as mana and 10% elemental damage

I checked buy backs and all my stash pages multiple times, as well as my shop. I also have a loot filter that makes big bang noise when unique drops.