Default String value with Json in gets lost on form render. Bug or extra config required?

Looking at a simple example where a String has json:

This is just a example use case, not really used in practice.
The string is stored in the XML as:
defaultValue="{"q":"1234567890"}"

When the Task list loads the form the value is missing from the form field:

Is this expected behaviour?

(and yes in practice would have stored the data as a Json type.) :slight_smile:

Thanks guys