6.2 MOBILE Nexus 7

Android 4.2.2
Nexus 7 

http://mf-geoadmin30i.bgdi.admin.ch/main/prod/mobile.html?lang=fr&topic=ech&X=190000.00&Y=660000.00&zoom=1&bgLayer=ch.swisstopo.pixelkarte-farbe&mobile=true

Start app
Rotate landscape
return portrait

Result:
no data is loaded,nav buttons do not work anymore  

Expected result:
work as defined

Workaround:
Reload app