Property mapPanes is null

Hello,

I have a problem with overlayView - a property mapPanes becomes null when a component is rerendered (by incoming items that create new overlayViews) and i am still giving this error message: TypeError: Cannot read property 'overlayMouseTarget' of null

from react-google-maps/lib/utils/OverlayViewHelper in mountContainerElementToPane

Here is my code:

const clusterMarkers = cluster && cluster.map((x, key) => <OverlayView
     position={{ lat: x.lat, lng: x.lng }}
     mapPaneName={OverlayView.OVERLAY_MOUSE_TARGET}
     getPixelPositionOffset={getPixelPositionOffset}
     key={key}
    >
      <div onClick={...}>
        {x.title}
      </div>
    </OverlayView>);
<GoogleMap
      ref={setMap}
      center={c}
      zoom={z}
      onZoomChanged={zoomChangedHandler}
      onDragEnd={centerChangedHandler}
>
    {clusterMarkers}
</GoogleMap>

Please, do you have any idea to fix it?

I am using v6.0.0

[techsev]

this solves the error messages BUT causes flickering on any setState that rerenders the map.

[tomchentw]

Please refer to Getting Help section in the README (or #469).