I am having issues with materials in silo bins not back flushing correctly when the weight on an SU is lower than the weight needed for the process order batch. The silo bins are WM managed, batch managed, and SU managed. Say if the bin pulled 300 KG but there is only 250 KG on the oldest SU, the system will not look to the next SU and issue the rest of the weight. There is plenty of weight on other SUs in the bin, but the system only looks at this one SU and says there is insufficient stock. How can I make the system issue the 250KG and then get the rest of the weight from the next SU?