AirBnB support staff contacted me a couple days ago, however my co-host handles all online communications so I didn't see it until today, and the guest also didn't mention anything to me.
I think if there is a co-host feature then all communications from AirBnB should go to both the host and the co-host. All guest communications go to both, so why not the communications from AirBnB itself?
It didn't matter in this case but I have seen in certain types of support cases where Support staff moves extremely quickly to assume agreement by the host when the host doesn't respond within mere hours, never mind if it's overnight in a different time zone.
If this was such a case there is no way I could have responded in time. Please improve communications by the support people, I think they do a great job but the technology of the platform needs to ensure they reach all the relevant people.