Header showing as close even if all the Product line is not closed status

Summary:

Need to undersatnd how come the subscription header is closed even if the all the product lines are not close. Ideally header should come in 'Closed' status only when all the lines come under the 'Closed' status. Please explain what the exception is here, is it because we have the 'Future' date mentioned for some lines and their system bypass them with the status changed?

Please explain/

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Version (include the version you are using, if applicable):

R13, 25D

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