Encrypt every new/edited property: bug or feature?

Personally, I think it's a bug.
Affects: Openfire 3.9.2/3.9.3.

I noticed the editing a property value via the Openfire admin interface leads to encrypting the value. For the test purpose I've created the new property - the same result. At the System Properties page it is displayed as 'hidden', in database - encrypted, security.xml contains the new property name for encryption.