Reitstoen
It should not be necessary, according to the wiki: https://wiki.openstreetmap.org/wiki/Tag:natural%3Dbay
"Rendering. Since bays are generally part of a larger waterbody, either a lake or the ocean, they should not be rendered in solid color indicating water themselves. The Standard tile layer renders named bays with a label."
I would say there is something "wrong" with the render. Do you have an example? It's seems to be correct on osm, Mapbox and other examples I could find.
