Steps to Reproduce

https://zkfiddle.org/sample/1b5jnh4/3-Gmaps-Markers-are-not-beeing-removed-after-change-lat-lng

Run fiddle (add gmap API key)

Zoom on the marker as far as possible (zoom will be logged > 19)

click button to move the map marker

Current Result

map marker is not moved, when map is zoomed < 19 again, another copy of the marker is created at the new location, but old marker is not cleared

Expected Result

map markers continue to work even if zoom > 19

Debug Information

Caused by the _findMaxZoomLevel function returning a max zoom level of 19 even though the map's actual max zoom level is 22 in this location

As a result, during _realBind, ZK initializes the map first, then initializes the MarkerManager instance for this component.

The marker manager gets initialized with a max zoom value of 19, so internally the marker manager doesn't generate layers for zoom levels > 19

If the marker is moved while the zoom level > 19, the marker manager just ignores the deletion request, and will not reattempt to delete the marker later once the zoom level goes back <19

Workaround

override the default value of _findMaxZoomLevel to 22 (current highest observed zoom level)

<script><![CDATA[
		zk.afterLoad("gmaps", function () {
		    var _xGmaps = {};
		    zk.override(gmaps.Gmaps.prototype, _xGmaps, {
		    	_findMaxZoomLevel: function() {
		    		var types = this._gmaps.mapTypes;
		    		var mapsMaxZoom = 22;
		    		for (var type in types ) {
		    			if (typeof types.get(type) === 'object' && typeof types.get(type).maxZoom === 'number') {
		    				var zoom = types.get(type).maxZoom;
		    				if (zoom > mapsMaxZoom) {
		    					mapsMaxZoom = zoom;
		    				}
		    			}
		    		}
		    		return mapsMaxZoom;
		    	}
		     });
		});
	]]></script>