@Sandy170 Is the 4.8 rating since you started listing or is it for the last 12 months? If you go to quality and then super host you should see what your ratings are for the last 12 month period.
I find it strange that this has happened at the same time as linked calendar issues and issue with a customer service representative (or whatever the online 'help' people are called) who is constantly responding with information totally unrelated to the calendar issue I contacted 'help' with.