GeoGebra on iPad Pro

GeoGebra 5 crashes to a white Rtina screen

Hi! GeoGebra 5 app installed on iPad Pro gives (for me) a "white" blocked Retina screen when using the NEW button. I must delete the app and get it from App Store and open it again. Is this a common/known fault or ....? Ingmar Olsson ioprog@ioprog.se