As a Supervisor, when assigning an Item to a Subordinate, after selecting the Item and Assignment Type, the Priority field can't be edited.
Reproducing the Issue
Under My Teams > Links > Assign/Remove Learning > Select the Item and Assignment Type > Priority can't be edited.
Priority option on Assign Learning will only be available to edit when Supervisor selects a Curricula, whereas it will be blank when assigning free floating Items and Programs.
Priority field is not editable, Supervisor assignment, Assign/Remove Learning, Links, Supervisor Links, Tile , KBA , LOD-SF-LMS-COR , LMS Core - Items, Catalog, Curricula , Problem