Plan balance calculation on hitting 5 year anniversary

Summary:

Hi,

Our absence plan runs from 01/04-31/03 annually. On the 01/04, the system will check if an employee is due to hit their 5 year anniversary during the plan year and if so, pro-rate additional leave required as per organisation policy.

This process works well however, we have an issue with a re-hire record not generating the additional leave due. The solution was implemented by our third party provider at the time and we are finding it difficult to troubleshoot this issue.

Can I ask for any advice around - where the check how the system is set up in terms of what date the calculation is looking for? For the rehire, the legal employer hire date and enterprise seniority dates are different.