출처 : https://us.forums.blizzard.com/en/sc2/t/co-op-mastery-ascension-xp-issue-resolution/6137/1
 




 CO-OP MASTERY & ASCENSION 
 XP ISSUE RESOLUTION
 General Discussion







 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 and going through January 1st, PST.




 War Chest Extension
We will be extending the War Chest duration by 10 days from December 5th, PST to December 15th, PST to allow players who have purchased a War Chest to receive additional time with their War Chest Boost for Co-op XP.



 Stimpack Boost Extension
For those players who have purchased the Mengsk Master Bundle, we will be extending the duration of the included Stimpack Boost by 10 days. This particular extension will be added at a later date before any Stimpacks run out.

Thank you for your patience while we resolve this issue.
출처 : https://us.forums.blizzard.com/en/sc2/t/co-op-mastery-ascension-xp-issue-resolution/6137/1