Good Evening Everyone,
Just thought I would mention a bug I think exists with the in-game addon. If you have a legendary item and the armour for an upgrade of that legendary item then the addon gets confused and does not allow you to equip the actual legendary item, I hope that makes sense.
I had a 190 ilvl gloves legendary item and bought a 225 ilvl armour upgrade for them but the addon got confused and would not let me equip my 190 gloves - I had to log out and back in the game and manually equip it.
Hope that helps fix a bug?