I've heard some listings were temporarily suspended because the guest asked a refund based on some true or false claims like bedbugs or similar. Did you have any unhappy guests... or neighbors lately?
Did you check if your city or country has some restrictions about hosting or max no of people in the same unit ?
And also, all hosts are now required to agree to Airbnb COVID-19 safety practices. To continue hosting on Airbnb, you must agree to the COVID-19 safety practices by Nov 20, 2020. If you don’t agree by this date, your calendar may be blocked and guests will be unable to book future reservations