Airbnb calendar syncronization


I have syncronized my calendar with Aribnb's. In my Airbnb calendar I allow guests to reserve my property at maximum 9 months in advance. This is also reflected on Booking calendar. However, there is a bug: on Booking.com the guests can reserve the property from 0 to 8 months in advance (ok), then they cannot reserve from 9 to 12 months in advance (ok), but then they can reserve again from the 13 months onwards.

Can someone fix this?