Markers do not keep their place

I copied the "simple" example and when I zoom out the marker moves it's position over the map.

Map here seems to work: http://google-map-react.github.io/google-map-react/map/simple/
Source doesn't seem to behave the same: https://github.com/google-map-react/old-examples/tree/master/web/flux/components/examples/x_simple

What do you need from me to debug this?
