AP Invoice Accounting date defaulted with Future enterable accounting period date

Hi Experts,

Our accounting date basis in the invoice options is set to 'System Date'. The user created the invoice on October 1st, 2025, but since the October 2025 period in Payables was closed at that time, the accounting date defaulted to November 1st, 2025. The November period was in a 'Future Enterable' status. Is this the expected behavior? Also, is there any way for the system to default the accounting date to an open period instead?