When the end date of a task is edited in the End Time column in Gantt in the save event handler e.task.end returns the new end date value. With versions, before 2020 R3, the old end task value has been returned.
The behavior is inconsistent with editing a task through dragging or by double-clicking on a task as in such case the previous value of the end task will be returned
With the current version, the new end date is returned.
The returned e.task.end should be consistent with the other ways of changing the date e.g. dragging or double-clicking on the task.