I went to go to my bank to use Talonclaw to try out Survival with the new patch (I never obtained a polearm in BFA) and all three of my Legion Artifacts are nowhere to be found on this character.
Considering these were undeletable, could the patch have accidentally deleted these from my inventory?
This is the same account posting on a different character, just to say that this has also happened on my druid. Is this happening to anyone else?
It happened to me too on my protection and holy paladin, i tried to do the quest “A gift from the six” but i realized i only had the retribution artifact weapon. I checked bank to see if those were there and they weren’t 
I noticed the same thing has happened to my priest tonight. I have 2 of the transmogs for Light’s Wrath (and two for Xal’Atah) unlocked in my appearance tab, but no artifacts to be found anywhere other than T’uure, which was moved to my inventory from void storage. I did run back to Netherlight Temple & was given the quests to reacquire the missing artifacts; it might be annoying to have to do those missions over again, but it’s less inconvenient than dealing with customer support, so I would recommend trying that if you guys haven’t already found a solution. What’s troubling me is that my garrison hearthstone has seemingly vanished and I’m rather worried I’ll get out there to find everything bungled to smithereens.