Opening inventory changers

Why does the inventory balance change when carries over to the next month?

Can you show some screenshot for reference what you are referring to?

December

January 2025
Previous one is December 2024 and this one is January 2025

What exactly is that a screenshot of?

Please show the full screen

@Dilhara1 click Recalculate button and see if it changes your opening inventory and closing inventory.