E1: 03B: Discount taken is missing in R03B575

Discount was settled for some customers as following:

- Payment term code: 30E (Discount taken if receipt done < 30 days)

- Due date date: 30 Days (based on invoice date)

- Discount rate: 0.005 (0.5%)

We run customers receipts by submitting batch R03B571. It runs R03B575. It displays selected invoices with related discount taken, when applied. It worked as designed till last week. Discount available amount was calculated and displayed on invoices entered manually or generated by R42800. 

Now the issue is Discount taken amounts aren't populated on R03B575, for receipts meeting discounts rules

Do you know why it changes suddenly? Setup is the same. No change done on setup.