Same thing happened to me. Incredibly frustrating and now the SECOND time I’ve received something of the wrong item level since the patch last week. At this point I don’t have any reason to trust any of the gear interfaces. Opened a ticket but it says “4 days wait” which is insulting. I reported another similar bug with Trophy of Strife items last week and it’s still not fixed, so I’m not very hopeful here.
Similar thread here: PVP Item from Great Vault missing ranks - #3 by Dårko-area-52