Already did since the 01-06-20. Here's a link to the post :https://forum.wow-freakz.com/Mark-of-the-Glade-Guardian-220676-t584489.html. Hope you can resolve this issue soon.
The same thing is happening to me as well on my guardian druid. I looted the hidden appearance "Mark of the Guardian Glade" use it but it doesn't appear in my artifact appearances. I tried a ...