STO - Shipping tab disappears once auto shipping point changed to manual shipping point

Hi All,

In shipping tab of inter company Stock transport order. The automatic shipping point 'A' picked up. Once I change a shipping point A to manual shipping point 'B' the shipping tab will disappears from STO. I have checked the STO before saving. There are no errors.

In the same case. If I create a STO and save it with auto picked shipping point A.

Later,

I go me22n and change the auto picked shipping point A to manual shipping point B, by the time the shipping tab will not disappear.

Configuration is correct from MM and SD end. Pls confirm whether it is standard function of SAP or it is miss in configuration.