Withholding Tax not showing for few invoices at review installments stage while submitting PPR

Summary:

The Withholding tax amounts are calculated correctly after payment based on the applied tax rates. However, it has been observed that the WHT is displayed as Zero for few invoices at the Review Installments stage during Payment Process Request, even though WHT is calculated after payment.
Our withholding tax calculation point is payment and withholding tax is allowed for suppliers

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