When the Summary input is enabled/checked, should the Summary field under Default value automatically display

Problem/Motivation

When the Summary input is enabled/checked, should the Summary field under Default value automatically display? Or should it only display after the field has been saved? How is this handled in other places? - not sure but also seems like a follow up as this is about fixing a bug (least how I understand it)

Steps to reproduce

TBD

Proposed resolution

TBD

Remaining tasks

TBD

User interface changes

TBD

API changes

TBD

Data model changes

Release notes snippet

TBD