Calendar connection failed
I noticed today that the calendar at Booking .com did not include the bookings from Airbnb, despite that it says the connection has been updated and completed three hours ago. The bookings from Airbnb took place several months ago, so it has not happened after the update. If I hadn`t seen it, it might have become double bookings! I had to go in to the calendar on Booking.com and close the dates myself.
How could this be, and how can I avoid it to happen again?