I heard from a service that helps AIrbnb hosts that his has suddenly become common. Try connecting with a direct message on Twitter to Airbnb, they will contact you in a day. I am still fighting to get two underpaid bookings corrected. In my host transaction CSV, it clearly shows the contracted amount and the amount transferred to my bank are different.
I warned the AirBnb staffer that there is probably someone inside who is committing fraud by siphoning off a bits of payout money from many accounts.