I'm the developer of Superhost Tools an automated messaging tool and I can tell you there are a lot of other people experiencing this issue as well. A lot of my users with co-host listings are having this issue. I'm not sure if that's reassuring or not. 🙂
It's been happening for a long time, I don't remember when I first noticed it but it was at least a few months before November. Airbnb is aware of this issue but maybe this post will help escalate it? As you mentioned, it's been happening for a really long time!
When you are looking at the reservation details and getting the error are you using the Airbnb app or website?