Hey there Tyrande.
The problems associated with the 120 Boosts and in this case specifically the Heart of Azeroth are issues we are investigating further as we speak.
I realize it is frustrating to encounter these issues and I appreciate that you took the time to let us know, the more reports we have the easier it is for us to gather that information and make sure that they are investigated further.
If you have not done so already, please take the time to also report this in-game via the “submit bug” option. As I said, the more information our developers have the easier it is for them to prioritize and fix issues.