Coop: Not gaining experience on Mastery!

[BurnD-11132]

FYI - There is now a blue stickied post in General Discussion:

Co-op Mastery & Ascension XP Issue Resolution

Hey everyone, With the 4.11.0 patch, we made a change that prevented players from earning Mastery and Ascension XP in Co-op Missions. With our patch today, we are correcting that issue. We also want to help make it up to players who lost XP during this time. With that in mind, we will be taking the following actions: Holiday Bonus We will be turning on our Holiday Bonus XP earlier than initially planned. We will be running a period of 100% Holiday Bonus XP starting tomorrow, December 6th, PST…