[Bug] System.InvalidOperationException Message=Handle is not initialized.

[pabloat81]

Describe the bug
I copied the advancedPage from the example code.

I added a new/edit page, a event view page and navigation.

Navigating between pages works fine, but when i go with the back button to a section previus to the "advanced calendar example page" and enter again i am geting this exception:

System.InvalidOperationException
HResult=0x80131509
Message=Handle is not initialized.
Source=System.Private.CoreLib
StackTrace:
at System.WeakReference1.set_Target(T value) at Xamarin.Forms.BindingExpression.WeakPropertyChangedProxy.Unsubscribe() at Xamarin.Forms.Internals.TypedBinding2.Unsubscribe()
at Xamarin.Forms.Internals.TypedBinding`2.Unapply(Boolean fromBindingContextChanged)
at Xamarin.Forms.BindableObject.ApplyBindings(Boolean skipBindingContext, Boolean fromBindingContextChanged)
at Xamarin.Forms.BindableObject.BindingContextPropertyChanged(BindableObject bindable, Object oldvalue, Object newvalue)
at Xamarin.Forms.BindableObject.SetValueActual(BindableProperty property, BindablePropertyContext context, Object value, Boolean currentlyApplying, SetValueFlags attributes, Boolean silent)
at Xamarin.Forms.BindableObject.SetValueCore(BindableProperty property, Object value, SetValueFlags attributes, SetValuePrivateFlags privateAttributes)
at Xamarin.Forms.BindableObject.SetValue(BindableProperty property, Object value, Boolean fromStyle, Boolean checkAccess)
at Xamarin.Plugin.Calendar.Controls.MonthDaysView.DiposeDayViews()
at Xamarin.Plugin.Calendar.Controls.MonthDaysView.Finalize()

To Reproduce
Steps to reproduce the behavior:
Dont have an example code

Version information:

• Plugin version: last
• Xamarin.Forms version: 5
• Platform: UWP