Positive Pay is getting generated in standard format even though we are attaching custom format

Summary:

Positive Pay is getting generated in standard format even though we are attaching custom format

Content (please ensure you mask any confidential information):

We have created Custom Positive Pay Template and attached it on newly created Format, then attached this on Payment Process Profile.
But when we are making the payment and generating positive pay, then we are getting standard positive pay rather than custom one.
Can anyone help us why this is happening here?

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