Lead time not respecting calendar

Summary

Supplier Lead Times not respecting close days in calendar

Content

We currently have problem where we have closed out our christmas period in the supply plan and although planned orders are not being suggested for release during the close period, the last day before this date is very heavy with order for release?

example:- Supplier on 2 week lead time (14 days) due to release in the plan on the 26/12/2019 for delivery on 09/01/2020 which is 14 days (10 working days), however we have the supply plan closed from the 23/12 to the 03/01 and so the release date for the order has moved to the 20/12. Although this is 20 calendar day's, it is only 4 working day's due to the closure and should see the order being suggested for release on the 13/12 to honour the suppliers agreed lead time.