Issue ->
While editing the form , no fields are appearing , but while testing the form we are able to see the fields .

Solution –
As per the backend logs, it is clear that the user opened the same Form Designer in multiple tabs. Changes were made and published using one tab. However, when the user clicked the Save button in other tabs, the form was saved again, resulting in the previously published configuration being overwritten with an empty configuration.
This is how the values were updated.
Why were the fields present during rendering but not visible in the Form Designer?
This occurred because, during rendering, the form definition is picked from the last published or live-edited version.
This occurred because, during rendering, the form definition is picked from the last published or live-edited version.
