Today, I had a request to book. I accepted it - and an hour later saw that it was still 'open' (hadn't been accepted or declined).
I accepted again. And checked an hour later to find that it was still open.
Both 'accepts' were from my Windows 11 laptop. A similar problem 2 years ago had led to a conversation with Airbnb support, and they said to use Windows for responses. (In that case I had used my Android phone.)
A third try failed. The fourth succeeded.
Last week, I was 'dinged' for failing to respond to a request within 24 hours. I don't monitor my email account, because Airbnb 'texts' me the requests too. The text arrived after the 24 hour was done.
I don't know how to solve the problem, but do know that I can't fight with the app / website to make it work. This isn't my primary income.