When creating a time line, jira provides editing or changing the time of the Epics. but when a child issue is added to a relevant epic in the timeline, jira does not allow to change the time. it is automatically set to the sprint time line which the issue is included.
Tried out by adding "Start Date" and "End date" configurations to the issues. but still the gantt chart is not changing and also the expandable icon appear when the mouse pointer hovers in the end of the pillar in epics are not appearing for child issues.
can I know that is there any change in settings or a permission to be granted to enable this feature to create timelines.
