Custom Field Type Number's Default Values Do Not Get Populated On SD Customer Portal

To Replicate

1- Create custom field
2- Associate it to Service Desk customer portal(JIRA Service Desk Screen for Project XXXX)
3- Set default value for the custom field
4- Add the custom field to Service Desk "Request Type"

Expected Behavior

On customer portal and that particular request, the custom field should appear with default value

Actual Behavior

The custom field is empty on Service Desk Customer portal.