lost my mythic helmet but idk how

so i was at pvp with ladybug and before i went in, i checked the durability of all my gear and my helmet was at 900+. after one round of pvp, i went to put my gear away and my helmet was gone. :( i don't know if it dropped or it broke but i didn't see it and ladybug didn't see it at pvp, so i just want to let you guys aware of this, hopefully it's not happening to anyone else because that stuff is pretty expensive.