Position Synchronization not updating the Assignments for Non Workers

Summary

Position synchronization process is correctly updating the Employee Assignments but not Non Worker Assignments.

Content

Position Synchronization is enabled from 1/1/1900

Created a Position with Assignment Category as Part-time regular from 1/1/1900

Updated the position with Assignment Category as Full-time regular from 1/1/2020

Created a Non Worker as of 1/1/2019 and added the position on the Non Worker. At the time of hire, the position was part-time regular, so the assignment also says the assignment category is part-time regular.

Ran the Synchronize Person Assignments from Position process with 365 days (Even though, I could have run it for 2 days). The Non Worker assignment records aren't updated with Assignment Category.