I added a coastline to Fairway Island to get it to render on the standard layer (and the Tracestrack Topo layer).
Another three island within the coastline were also affected and already had a natural tag. I the changed them to single member multipolygons and added natural=coastline to the way so that the ways did not need to be duplicated for the natural=coastline tag.
Feel free to revert/remove/alter if that doesn't suit.
Coastlines take longer to render...
https://help.openstreetmap.org/questions/82942/rendering-coastline-in-osm