Release Invoice In projects billing

When creating a credit invoice in Oracle Projects the date of issue is automatically set to the original invoice date instead of today's date.Can this be changed to sys date is the default setting? if the bill through date is 18-APR-19 and APR-19 period closed. Now In May-19 we want release the invoice at that time system should take Invoice date as sys date default?

I have raised SR with oracle team but the below solution was not worked.

Can somebody help me how to fix the issue.

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SOLUTION

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Billing extension pa_client_extn_inv_actions.release_invoice should be called as part of invoice release.