Frame IsVisible doesn't work when binding

Hi,

Have a very strange issue - if I set Frame IsVisible to true directly, it works fine, but if I bind it then it won't react to value being set.
I've tested same bindable property with Label in the same XAML and it works fine. This is on Android, haven't tried iOS yet.

XAML sample:

<Frame IsVisible="{Binding ShowFrame}" />
<Label Text="Label" IsVisible="{Binding ShowFrame}" />

So in example above when ShowFrame is set to true Label will show, but Frame not. If I set IsVisible="True" for Frame it works as well.

Any ideas?