Generally we recommend defining specific property rules not found else where within House Rules via the API configuration Settings > API Integrations > Airbnb > Change > House rules field.
I wanted to clarify as well, are you saying the setting completely disappears from Airbnb? Or does it just grey out and become unmodifiable? If the latter is the case you can also try setting your sync mode to "Limited" and see if you can change it in Airbnb then.
We have a walkthrough of this process here:
https://www.ownerrez.com/support/articles/channel-management-api-integrations-airbnb-common-issues-questions#changes
Let us know if you have any other questions or concerns!
~Caleb
