current Period is open still customer not able to post the sales transaction

Hello Team,

I hope you are all doing well. I am reaching out to discuss an issue our customer is facing when trying to post some of their sales order transactions while the current period is on hold. Below, I have detailed the scenarios and the specific problem they are encountering.

Scenario 1:

When Period 1 is open (1/1/2025 to 1/26/2025) and Period 2 is on hold (1/27/2024 to 2/23/2025), the customer is unable to post the sales order transaction dated 1/15/2025. They receive an error message stating: "Posting sales order 37061698 voucher msi-10058419 fiscal period for 2/5/2025 not open. The fiscal period is closed for module sales order on the date 2/5/2025. Posting has been canceled."

Scenario 2:

When both Period 1 (1/1/2025 to 1/26/2025) and Period 2 (1/27/2024 to 2/23/2025) are open, the customer can post 80% of the sales order transactions dated 1/15/2025 without any errors. However, they are unable to post the remaining 20% of the sales orders due to the issue.

I have already reached out to the Product Group (PG) team for assistance. They suggested opening the period, changing the session date, and then posting the transactions. The customer followed this advice and was able to post some sales transactions, but they continue to experience issues with others. Upon further inquiry, the PG team mentioned that this behavior is by design. However, the customer disagrees and has escalated the issue.

Could you please provide us with the reason why the system is behaving this way? Your insights and guidance on this matter would be greatly appreciated.

Thank you.