Requests created via email have NO priority if Priority field is added to Portal screen

Steps to reproduce

1. Create a new Service Desk with all default settings
2. Configure Email settings to handle incoming emails
3. Send a test email -> view request -> Priority field is visible
4. Edit the Request Type configured for Email settings and add Priority field as a visible field
5. Send another test email -> view request

Expected behavior

Priority field is visible.

Actual behavior

There's no Priority field.

Workaround

You can bulk edit issues to add a priority to them. You just need to perform the following advanced JQL: project = YourProjectName and priority is EMPTY.

Facts & Figures

• From table jiraissue in JIRA database, the value of Priority field is NULL.
• Enabling SQL Debugging, NULL is inserted for Priority field.