Something is wrong. If 100% of payment is going to lending fees, the principle should not have changed.
By the way, does anyone know what the components of "lending fees" are? Does it include the late fee that should be paid to the lender?
Not claiming that this is gospel, but I think it's something like this:
"Prosper Fees" are actually a poor designation for NSF fees, which Prosper sometimes charges to the borrower if an automatic pull fails. These fees reduce both the amount of the borrower's payment that gets applied to the loan and the amount of the payment that reaches the lender's account. "Late Fees" are sometimes applied if a payment is >15d late; they reduce the amount of the payment that gets applied to the loan, but not the amount of the payment that reaches the lender. The application and size of both of these fees depends on state regulations. In essence, the NSF fees go to Prosper, while the late fees go (eventually, in the form of a larger final "balloon" payment on the loan) to the lenders.
"Lending Fees" are the combination of Prosper's 1% servicing fee and Amsher's (supposed) 17% collection fee. They reduce how much of the borrower's payment makes it into the lender's account, but they don't change how much of the borrower's payment gets applied to the borrower's loan.
So, for example, say a borrower's automatic pull fails, as does the subsequent ten-day pull. The 23-day pull succeeds. And let's say that my share of that payment is $10. If $1 is removed for the NSF on the first pull, this will show up as a "Prosper Fee", which goes directly to Prosper. That leaves $9 available to go toward the borrower's loan and toward my account. If another $1 is removed as a Late Fee, this leaves $8 to be applied to the borrower's loan, first paying whatever interest has accumulated since the last payment and then reducing the principal. That's all the borrower sees in his/her accounting. The lender will then (maybe) see a reduction in how much of the $9 makes it into his/her account. In the case being discussed here, Prosper is somehow ginning up "Prosper Fees" that take ALL of the remaining portion of the payment. I don't know how this is possible, unless there's some additional fee that's snuck in there in addition to the servicing and collection fees.
And, FWIW, I also have noticed this recently with one of my loans. I inquired, received a nonsense answer that referenced a previous charge-back, and have inquired again. I'm awaiting further information.