Fixed zoomToShowLayer() markers disappearing bug
Fixed zoomToShowLayer() markers disappearing bug

Leaflet/Leaflet.markercluster,ghybs/Leaflet.markercluster,ghybs/Leaflet.markercluster,frenomus/Leaflet.markercluster,frenomus/Leaflet.markercluster,Leaflet/Leaflet.markercluster