Marker click changes center

[WaqarHassan]

I ma using Gmap4rails gem to populate rich markers on map.
When I click on marker, It changes map center automatically.
I don't want to change center on marker click.
Following is the code

var RichMarkerBuilder,
    extend = function(child, parent) { for (var key in parent) { if (hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; },
    hasProp = {}.hasOwnProperty;

RichMarkerBuilder = (function(superClass) {
    extend(RichMarkerBuilder, superClass);

    function RichMarkerBuilder() {
        return RichMarkerBuilder.__super__.constructor.apply(this, arguments);
    }

    RichMarkerBuilder.prototype.create_marker = function() {
        var options;
        options = _.extend(this.marker_options(), this.rich_marker_options());
        return this.serviceObject = new RichMarker(options);
    };

    RichMarkerBuilder.prototype.rich_marker_options = function() {
        var marker;
        marker = document.createElement("div");
        marker.setAttribute('class', 'marker_container '+ this.args.id);
        marker.innerHTML = this.args.custom_marker;
        return {
            content: marker
        };
    };
    return RichMarkerBuilder;

})(Gmaps.Google.Builders.Marker);

this.buildMap = function(markers) {
    // var handler;
    markers = _.filter(markers, function(marker){
        return marker.lat !== undefined;
    });
    window.handler = Gmaps.build('Google', {
        builders: {
            Marker: RichMarkerBuilder
        }
    });
    return handler.buildMap({
        provider: {fullscreenControl: false , clickableIcons: false },
        internal: {
            id: 'map'
        }
    }, function() {
        
        markers = markers.map(function(m) {
            marker = handler.addMarker(m);
            marker.serviceObject.set('id', m.id); // You can add other attributes using set
            return marker;
        });
        handler.bounds.extendWith(markers);
        handler.fitMapToBounds();
        // handler.getMap().setZoom(12);
        if (window.zoom && window.zoom !== undefined)
        {
            handler.getMap().setZoom(window.zoom)

        }else {handler.getMap().setZoom(12); window.zoom = 12}
        if (window.center && window.center !== undefined)
        {
            // handler.getMap().setCenter(window.center)

        }
        setTimeout(function(){
            bind_map_bounds_change()
        },100)
        return
    });
};

[WaqarHassan]

After spending days, I am unable to solve this issue,
Would be very grateful for the help.
Thanks

[apneadiving]

you should create a js fiddle or whatever online tool where we can actually see/reproduce the problem