Automatically populate Epic end/due date only when last feature is completed, instead of continuously

What is the challenge?

Epic due date is updated continuously when underlying features are completed/done if due date is set to "Calculate from features".

What is the impact?

Gives a "false positive" indication of an epic's due date which in turn impacts roadmap presentations and overview.

Describe your idea

Populate epic due date automatically only when the LAST feature is set to completed/done to give correct representation of start - end dates on epic level.