It appears as if there a number of guests who are trying to SCAM Airbnb and it's hosts at the moment using all manner of excuses by Guests "trying it on" because of there own personal issues.
It's wrong Guests are trying this on and placing the onus on us Hosts to cancel regardless of policy.
I've had several guests in the last month write to me claiming host cancelled, hosts home was not clean, my car has broken down and we need both will share a single bed as we hard love animals - my listing profile has animals from a local nearby park in it which is a drawcard and marketing bonus but when guests don't read my listing through and then try push me to cancel for there errors it's unacceptable.
Another common trick is booking then pressuring hosts to permit early check ins when one has an existing guest and trying to make hosts cancel rather than Guest.
I've had the MacDonald's Works burger of then in the space of 2 weeks!!
All the best and place the onus back on your Guests to cancel.