This is obviously still an issue, and I don't really want to pursue upgrading the Solstice of Heroes armour whilst there is still a risk of other armour pieces being removed in the upgrade. A response from a [b]Bungie[/b] member capable of further investigating exactly what happened would be appreciated. Edit: To clarify the sequence of events: 1. I completed the requirements for the upgrade from Drained. 2. I entered the Tower. 3. I had none of the Solstice of Heroes armour equipped. 4. I approached the statue, but no upgrade happened. 5. Whilst still standing at the statue, I progressively equipped pieces. 6. The last piece I equipped was swapping my Apocalypse Gauntlets for the Solstice Gauntlets. 7. Upon doing so, the 'upgrade' occurred. 8. After having done so, my Apocalypse Gauntlets were gone. (Just to reiterate: yes, I did check my inventory, the vault, the postmaster, etc. etc.) If anyone else has encountered this issue, please do chime in. For anyone responding, please avoid doing so if you're just going to copy-paste unhelpfulness. Bungie support staff would be appreciated, since presumably Mentors etc. are unable to verify the information required.