Hello,
I asked a friend to help me complete this treasure in Ardenweald today, so that I could obtain the Fae Harp toy. Little did I know that they had already completed the treasure. When we both tried to click on the world objects required to unlock the chest, they were unable to click anything (but I could, because I had not completed the treasure yet).
We had to ask around to find someone else who hadn’t completed the chest, and they were able to click on the world objects, and I was able to loot the chest. I don’t know if this is exactly a bug, but it did make it a little difficult to get complete this treasure. If it’s not a bug, please take this as a suggestion to have the objects clickable to anyone who wants to click on them.
Otherwise, I’m having a lot of fun with the xpac. Thanks for the great work Blizz!!