There are instances when a member might pay a loan via an A2A and the payment is applied as a principal only payment.
First, determine if the loan is a 360 interest calculation loan. In this case, the payment needs to be the exact amount for the payment to apply as a regular (non-principal-only) payment.
If for any reason a partial payment is applied to a 360 interest calculation loan payment, such as in instances when a delinquent fine is deducted, then the system would correctly apply this payment as principle-only payment.