We’ve recently become aware of a bug that could be exploited to allow instanced encounters to be completed repeatedly. We have developed a fix for the issue, and we are in the process of deploying it worldwide.
As soon as possible, we will identify those who knowingly abused this bug in exploitative manner. We will then take appropriate punitive measures.
As a reminder, Blizzard’s End User License Agreement defines cheats as “methods not expressly authorized by Blizzard, influencing and/or facilitating the gameplay, including exploits of any in-game bugs, and thereby granting you and/or any other user an advantage over other players not using such methods.”
As always, thank you for your feedback on this matter.