I've reported this to the project CoinMap, but they told me the issue was in Leaflet.
When going around the world, markers are no longer seen. It's like there were many world maps edge to edge, and only the “main” map gets the marks.
Original report is here:
https://github.com/prusnak/coinmap/issues/2
This is a feature/option.
To have the markers wrap around the world you need to enable worldCopyJump in the map constructor options.
http://leafletjs.com/reference.html#map-constructor
Most helpful comment
This is a feature/option.
To have the markers wrap around the world you need to enable worldCopyJump in the map constructor options.
http://leafletjs.com/reference.html#map-constructor