Not able to select "Project Lead" while creating new board

Issue Summary

Jira admin while creating new board is not able to select "Project Lead". Jira users are not affected since they have a different window during Board creation.

This a regression in Jira 8.13.1 . The issue is not affecting 8.5

Steps to Reproduce

1- Create a Board
2- Choose 'Create a Scrum board"
3- Choose "Board crated with new Software project" Click next
4- You can provide "Project name", " Project key" BUT "Project Lead" seems tome mandatory but filed is disabled
5- Note: that after clicking on the button "Create board" to board is created.
6- The setting of the new created project show the current user as "Project Lead"

Expected Results

User can provide a "Project Lead" during Board creation

Actual Results

"Project Lead" field is disabled

Workaround

You can Edit the "Project lead" after the Board creation

1- On 'Project Settings'
2- Click on 'Users and Roles'
3- Click on 'Edit Defaults'
4- You can edit the Project lead