PIR not consuming when GI issue against delivey for STO

Hi Team,

In my scenario, plananing stategy 40 used with MRP type P1 with time freme 5 days with farward(14) and backward(30) consumption.

Consumption indicator set as :3 ( consumption of dependent requirement,customer requirement , reservation ).

I have check that in production system, PIR not consuming when GI done agisnst delivery for STO .In production system ,good issue done with Z transaction with scanning process.

But same scenario , i have tested in other non production system it is working fine with z trasanaction as well as standard transaction.

I am not sure why system behaves like such in production system.

Could you please assit on this ?

Thanks

Vin