I have a PO that have two different Accrual totals in different modules

The customer has identified a discrepancy for a Purchase Order (PO) in a foreign currency. The amount remaining in the AP Accrual account does not match the amount remaining in the Receipt Accounting Accrual account.

The customer would like to understand why this variance exists, given that accrual accounts are generally expected to act as clearing accounts and ultimately balance to zero.

Additionally, even after taking the Exchange Rate Variance (ERV) into consideration and adding it to the Receipt Accounting Accrual balance, the total is still lower than the balance remaining in the AP Accrual account. The customer is seeking clarification on the source of this difference and the accounting logic behind it.