Sorry to hear about your weapon going missing. I had a bug on their end that deleted all of my stuff. I contacted blizzard in the hopes of getting it back… They won’t. Doesn’t matter if they deleted it cause of a bug on their end or not… what’s gone is gone…
Here is what they told me.
Sorry for your loss. Hope you can make another, but play careful. Easy to just lose items/progress/characters with out any warning.