The resolution for SRJIRA-3418 concluded that a field server-side script will always be triggered on the initial form launch.

If a radio button field is set required via 'Field Configuration', the Behaviour server-side script for that field is not fired until it is interacted with.

Steps to Reproduce

1. Create a 'Radio Button' field and add it to the issue
2. Make sure the field is set as required via 'Field Configuration'
3. Create a Behaviour, add the mappings, and add the 'Radio Button' field.
4. Add a simple script such as a log message, and launch the Create/Edit form.

log.warn 'Hello World' 

Expected Behaviour

The script should fire and the log should be logged.

Actual Behaviour

The script did not fire and log until interacted with.