Item received from Titan Residuum not showing in BiB

I bought this item Deathslaver’s Hauberk from Thaumaturge Vashreen today - level 475 M10 item.

BiB did not suggest I equip it and when I inspected the options for that slot it did not appear in the list.

After a complete reload of the browser and WoW the item now shows - as a minor DPS loss from my current 450 item!