Behaviour in Servicedesk Portal is not working/trigger when the Select List (single/multiple choice) field value changes.

Steps to Reproduce

1. Create custom field Select List (Single choice).
2. Add field to Request type.
3. Create behaviour and map to Request types.
4. Add server-side script for Select list.
5. Create request at servicedesk portal.

Expected Behaviour

The Behaviour script executed when Select list field changed.

Actual Behaviour

The Behaviour run once the form is loaded but not when Select list field changed.

Additional Info

Affected Jira version: 9.10.*