Have spoken with the service and changed my password again. The change is showing as pending so definitely there.
An waiting to be contacted and this has been passed along to security team.
the password I changed to yesterday was very strong, so I suspect this could only come from within my phone or internally from Airbnb. Apparently my phone is very difficult to hack and I do have added security?
There has been the largest ever data breach in Feb but I can’t see how this would be related.
I did find an article where something identical was experienced by another member in feb. In that case someone had registered a credit card and attempted to make a booking via that account using those details.
For now I think the safest option may be to log out on my phone and log out all of the sessions. Still when I checked the access sessions they were all only from my phone.