Employee data missing for 2 employees from T4 in Draft Mode

Summary:

Two T4's populated box information correctly, but is missing SIN and Employee Name and Address.

Content (required):

After an environment refresh, I have two employees in the test environment who's person information did not populate on their T4's. I was able to match up the previous register to identify the employees, but am not sure of the root cause.

This happened to one employee last year and the issue cleared itself up on the next run,

Any Ideas of what may cause this?

I reviewed the employees and there have been no changes to the employee record.