inspection lot summary after UD and stock posted

lot summary level '2' had maintained in material record, when GR, lot summary work rightly.

But after UD and stock post to unrestricted stock and new GR, no inspection lot generated and stock were posted to unrestricted stock directly.

My question is ,why system does not generate new inspection lot?

I also found it in document that , lot summart does not take place if "A previously created inspection lot has already been completely credited from the stock", is that means system will create new lot in this situation?

Regards,

Denis.