Restriction of Workers List on Journey Assignment

We have defined Person Security such that access is restricted by Business Unit (BU1).

On other screens such as Document Records and Personal Details, the list of workers is properly restricted according to the security configuration.

However, on the Journey page, we are still able to see a person assignment that is no longer within Business Unit BU1.

Case scenario:

We are facing an issue where a Pending Worker was initially in BU1 and was then converted to an Employee within the same BU1. The employee was later moved from BU1 to another BU2.

However, the user can still see the employee assignment in the Journey assignment list even though the employee now belongs to a BU that the user is not authorized to access.