Anyone else not getting 5% CB from topping up to Bigpay? Any recent changes to the T&C?

Im getting only rm11 CB from my regular bigpay topup. I donmonthly rm600 topup to maximize CB. But I did get a refund for failed purchase from malindo. But the total should still exceed rm 600.

Everymonth i topup bigpay rm600 regardless of other purchase. Last month i purchased from malindo thru website rm 900+.payment went through but malindo failed to capture the transaction so I was not given booking number. I purchased another time from malindo thru app which was successful. So even with the refund i expected full rm30 cashback from my bigpay topup.
The only thing out of the ordinary for this month was the refund.