Part Time Employees - Leave Requests (Employment Hero Synced)

I was wondering if anyone might have a solution?

We currently run MYOB AccountRight and have this system synced up to Employment Hero. In Employment Hero we currently submit leave requests and staff can also view their balance.

When staff submit a leave request in Employment Hero & it is approved, it automatically comes into MYOB as a timesheet for that selected date. When we then run our normal pay run, this is in the initial screen and all other timesheet entries & the leave is listed again on the second screen under than employees pay run information.

The issue we are having for part-time employees is the leave taken does not deduct this from the accrued leave balance automatically (despite the pay item being selected to do this).

Our part time employees are currently allocated a Base Hourly pay item and than have Annual Leave - Hourly Pay and similar for other leave types (e.g. Sick Leave).

This does work fine for our fulltime employees. It is only the part-time employees that we are running into this issue with.

Any advice is appreciated.