Azure Function call validation problem with empty JSON

When creating an Azure Function call in ADF, it demands a valid body for a POST request.

Entering an empty body `{ }` is accepted, however when the changes are published, and refreshed the body section remains empty.

This causes future publish changes to fail because the body is empty and triggers the validation error.

Expected behavior: After publishing changes, the body should contain `{ }` instead of being empty.

Work-around: enter the default `{"body":{"myMessage":"Sample"}}` in the body and publish changes.

This just seems like a bug to me, am I missing something?