How to prevent accrued hours from getting used when the Employee is on FMLA-PTO plan

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We have a plan - "FMLA-PTO" where the accrued PTO gets used as paid leave and the remaining as unpaid FMLA. Lets say an Employee with 80 hrs of PTO takes a 2 month FMLA. Then the first 10 days will get paid from PTO balance and the rest will be unpaid.

But while processing payroll,we found that the accrued hours in the 2 months get paid in the next pay period.

Eg, Employee takes a leave from 1/1/2023 to 3/1/2023. From 1/1 to 1/11, he gets paid from PTO and the rest of the days are unpaid. But the 10 hrs he accrued at the end of 1/31/2023 gets paid in the next pay period.