IsManipulationEnabled and AllowZoom

I have bound AllowZoom in the diagram to a property, but I set IsManipulationEnabled=“True”.
With the Mousewheel all is working well - it doesn’t zoom! But if I’m on a TouchDevice I can still PinchToZoom.
Is this behavior ok? Must I set the IsManipultationEnabled as well?

Yes, I believe you should.