Default value is not saved in new field

Problem/Motivation

New field of a type Flexfield do not save configured "Default value".

Steps to reproduce

In Article Create a field of type Flexfield, Save field settings,
Set "Default value" "some text" for ex. Save settings.
Edit field, "Default value" is empty. Expectation is to contain "some text".

Note: second edit, save settings - the default value is saved.