I am having the same problem at the height of our season. For March, April and May, I was fully booked..26 days a month.
Now NOTHING for June or July.
I tweeted to Abnb and got a prompt, meaningless answer.
I accepted two bookings in June from another platform with the calendar synched with ABNB. Could they be punishing me or is that too paranoid? It doesnt make any sense. I am not the cheapest but offer a unique situation in a great area for tourists or university visitors alike. Normally, my place is more booked than nice less expensive nearby rentals.
Please, any thoughts?