ListView Behaving Incorrectly In WP

Hi

I'm developing a Xamarin Forms app, and have a control (button) that floats above a ListView on the page.

However, whenever I tap the button that sits over the ListView (with a higher ZIndex), the ListView still responds to the tap event as if the button covering the ListView wasn't there.

Even if I handle the tap event on the button and set Handled flag to true it has no effect.

Is there any way around this bug

Thanks

Dean