No update a month after repayment date

I have been looking at FS's T&C's and have not been able to find out whether the interest paid by the borrowers is ring fenced i.e. if a loan defaults and either all, part or no capital is recovered can we be assured that at least we shall receive 100% of the interest due to us? It seems that FS has a tendency to agree extend the loan period whenever a borrower asks, providing he has paid the interest to date, without, I suspect, updating the DD in order to (A) establish the likelihood of the borrower ever being in a position to repay the capital or (B)whether the current value of the security is still sufficient to recover it. No loans seem to be "renewed" nowadays but are "extended" so we are unable to have our capital and interest repaid at the expiry of the original loan period and just have to sit back and hope for a good outcome. If we can be assured that no matter what happens to the loan or the platform we will at least get our interest it will be some small comfort. OK, I know that many investors will say that I should be more savvy by anticipating loan failures and selling them on the SM whilst that option is still available but I neither have the time or the financial experience to make that judgement.