While it might be temporary, Mr Cooper is currently taking payments via debit card on the phone due to cyberatttack. Unfortunately, they are not my servicer, and I don't know if you can run multiple transactions.

I further recommend even if your payment is not due is to stuff as much as extra escrow payments. You might get paid interest in some states and it is not hard to wait a few months and then ask them to run an escrow analysis which can result in a check for overpayment.

I am guessing they always offered this option, but it was hard to get it to work.

https://www.foxbusiness.com/markets/cyberattack-major-mortgage-service-leaves-customers-without-online-payment-option