What Changed
In previous versions, a task's progress does not change when you update its duration. For example, if you double the duration of a half-completed task, its progress remains at 50%. In v20.2, the progress is recalculated based on the previous duration and the updated task. In the example above, the progress is now 25%.
Reasons for Change
If a task's duration increases, the amount of work also increases, but the amount of completed work stays the same.
Impact on Existing Apps
Existing applications now take into account the previous and updated task duration when they recalculate a task's progress.
See Also
Bug Report: T935477 - The Gantt control does not update a task's progress when a user modifies the task's duration.