Summary

Jira Service Desk project allows Priority field to be hidden. The value will be NULL. This will trigger the bug in "Create Linked Issue" feature wherein the target project, the Priority will be set to the highest in the sequence of available Priority, e.g. Critical.

Default value for Priority in Jira configuration will be ignored.

Steps to reproduce

1. Create two Projects, One should be Service Desk type.
2. Make sure the Default Priority is "Low" from the priorities section
3. Go to the Service Desk project and hide the Priority field from the Field configuration.
4. Create a ticket in Service Desk project
5. Click on "Create linked issue" button and create a ticket to the second project
6. The priority will be set to the highest in sequence in that instance]

Expected result

Default priority is set on the linked issue.

Current result

Highest priority is set.