Normally, sub-tasks move together with their parent task. When the parent tasks deadline changes — the sub-tasks are shifted accordingly:
Please note that the parent task deadline changes automatically when closing the task (to the real closing date).
This functionality helps maintain the same “distance” between the parent tasks and their sub-tasks. But, for some teams, maintaining the original sub-tasks dates is more important.
For such teams, we just introduced the new flag in global settings — it prevents the shifting of sub-tasks dates:
