In the weeks or months leading up to a new Game Update or Expansion, players have come to expect the familiar call to Testers to try out new Group or Raid content. Sometimes a specific schedule is posted, with developer chaperones to monitor player reaction to encounters, zone design, and so forth. At other times, testing as at-your-own pace. Either way, Bug Reports are collected and placed in a queue to be fixed at some future date.
If any “show stopping” bugs occurred during this Testing, such as a boss that would not spawn or could not be defeated, or a door or gateway which would not activate, the testing session would end prematurely with the feeble hope that players would return the next night to make another go of it. Even if many of those players could find time in their schedule to test again, this shortcoming has led to less enthusiasm for testing and a diminishing pool of testers.