@Pete69Individual star values are different. I thought you were referring to "Overall" stars. Overall star values used to be displayed just like the sub-categories, so, one or two 4-stars and you would still be listed as 5-stars overall. ie, it would take several lower ratings to display your rating lower.
But earlier this year Airbnb started experimenting with displaying the actual breakdown of the "Overall" rating and that's why you now see the rating to the nearest decimal point.
There are actually several posts on this from back when they first rolled out the new display...