Seems to be quite a common problem. I wonder how many people globally have never been paid (and Airbnb still holds their money) due to not realising the missed payment.
Sounds odd and I have never experienced it in past 8 months of my hosting! 14 guests later and I got paid for every one of them between 24 hours to maximum of 48 hours later, depending on weekend or method of payment. Hope payment turns up quickly!