Leaflet Maps Add-On Multiple Base Layers Glitch

Hello all,

we are using a Leaflet Map with both aerial and normal version of Bing Maps. When adding both layers zooming in and out is glitchy, screen flashes and iterates between both tile types (at the end it displays correctly). Anyone else experiencing this? Is there something we can do? Below sample code:

LBingLayer bingMapAerial = new
         LBingLayer("our_api_key");
         bingMapAerial.setType(org.vaadin.addon.leaflet.shramov.LBingLayer.Type.AERIALWITHLABELS);
         this.leafletMap.addBaseLayer(bingMapAerial, "Bing Aerial");

         LBingLayer bingMap = new
         LBingLayer("our_api_key");
         bingMap.setType(org.vaadin.addon.leaflet.shramov.LBingLayer.Type.ROAD);
         this.leafletMap.addBaseLayer(bingMap, "Bing");

We initially used Google maps add-on but that one does not work in China (Google supports it but GWT-Google maps -branflake's one- uses old API that does not).

Then we used Leaflet which supports the chinese version of the API however they only serve (Google) chinese maps over http only and not https so that went out of the window as well.

Now we use Bing Layer and that glitch appears which is kinda of frustrating having put so much effort for a simple map solution and still facing issues no matter what.

Any help would be greatly appreciated.

Regards,
George