Answer
Parental leave can affect the value of Annual Holidays even though the employee stays in continuous service. Annual holidays that become entitled during parental leave, or in the 12 months after the employee returns, may be paid using average weekly earnings without the ordinary-weekly-pay comparison.
In Lightning Payroll, review the employee's completed pays and the leave valuation before paying annual holidays after parental leave. The valuation is shown on the leave row when you edit the pay; if the calculated value does not match the required parental-leave treatment, override the rate on the leave row using the employer's calculation and the Value recalculates.
Do not change the annual holidays balance just because parental leave changed the payment rate. The balance and the valuation are separate issues.