We are currently experiencing an issue with the Hallow's End candy buckets that is affecting the Trick or Treat Achievements for this event. Certain candy buckets in Northrend, once looted, are preventing characters from looting some of the Candy Buckets required for the Trick or Treats of Eastern Kingdoms, Kalimdor and Outlands. The current way to work around this is to get the candy buckets from Eastern Kingdoms, Kalimdor, and Outland before doing any in Northrend.
Note, doing the Achievements first will prevent some of the Northrend Candy Buckets from being intractable.
We are actively working on a resolution for this and will provide more information when it is available.
