So I had entered Rheasilvia from The Strand and came across a random chest here: https://1drv.ms/u/s!Amn1PRGezhfwiGzYSi71Fgu8aVkW I opened it assuming it was an HVT chest and lo, the riddle chest triumph completed for me. I had never opened the Rhea riddle chest before, just the other two. I know some people have complained that one chest never seems to spawn lately, perhaps this is why? It’s showing up in the wrong place.