Definitely a bug. Reach out to Airbnb and get a case opened to look into it.
Step 1: Visit https://www.airbnb.ca/help/contact_us
Step 2: From the bottom of the screen, choose either "My question is about something else" or "I have a different issue"
Step 3: Follow the prompts to figure out what best describes your issues. Some things you choose will take you to specific information whereas others you can fill in the text box and submit your question.
When you submit a question, you can expect an answer back from a Community Expert within five minutes but usually less. If the Community Expert cannot help you, they can re-route your issue to Airbnb who will then contact you. Airbnb Community Experts do not have access to your account information so if it is a question that can only be answered with account information, they will re-route you automatically. Airbnb Community Experts are available 24/7 and again, usually you will have an answer from them within minutes.