Grade in the Position Override page is copying the grade in the previous assignment

When doing transactions for employment pages like Change assignment in Redwood, when you go to Position Override, the grade is not editable, and it copies the grade from the previous assignment. It should have a new grade since a new position was assigned to the employee, and a valid grade was assigned to this position.
The Grade attribute is included to be sync from the position.

This is the current assignment of our user:

This is the position that we are going to assign for this employee, and it has a valid grade of Grade 9.

When doing Change Assignment, the Grade in the Position Override Section copies the grade from the previous assignment, not the grade in the position that we are going to assign.