Automate Deduction or Lost Payment Entry

Before this. whenever i have unallocated amount in payment entry, everytime i type it to 0 and hit enter, it would automatically create a line to write off the entry in “Deduction or Loss”, but i can’t do it anymore now, it would just go to the field “Difference Amount” instead and need to enter the write off manually, is it the new feature or is there something wrong with how i do things?