[Bug] Crash when hot-reloading CollectionView after edit

[Tommigun1980]

1. Have a collection view in your page
2. Do some edit in the page's XAML
3. The page should reload properly in the simulator
4. Add an item to the collection view (in my case I use the UI to add chat messages)

Crash:

"Cannot access a disposed object.\nObject name: 'GroupableItemsViewController`1'."

"  at Foundation.NSObject.get_SuperHandle () [0x00012] in /Library/Frameworks/Xamarin.iOS.framework/Versions/14.0.0.0/src/Xamarin.iOS/Foundation/NSObject2.cs:394 \n  at UIKit.UIViewController.get_IsViewLoaded () [0x00023] in /Library/Frameworks/Xamarin.iOS.framework/Versions/14.0.0.0/src/Xamarin.iOS/UIKit/UIViewController.g.cs:2147 \n  at Xamarin.Forms.Platform.iOS.ObservableItemsSource.NotLoadedYet () [0x00000] in D:\\a\\1\\s\\Xamarin.Forms.Platform.iOS\\CollectionView\\ObservableItemsSource.cs:289 \n  at Xamarin.Forms.Platform.iOS.ObservableItemsSource.ReloadRequired () [0x00000] in D:\\a\\1\\s\\Xamarin.Forms.Platform.iOS\\CollectionView\\ObservableItemsSource.cs:294 \n  at Xamarin.Forms.Platform.iOS.ObservableItemsSource.Add (System.Collections.Specialized.NotifyCollectionChangedEventArgs args) [0x00023] in D:\\a\\1\\s\\Xamarin.Forms.Platform.iOS\\CollectionView\\ObservableItemsSource.cs:165 \n  at Xamarin.Forms.Platform.iOS.ObservableItemsSource.CollectionChanged (System.Collections.Specialized.NotifyCollectionChangedEventArgs args) [0x00061] in D:\\a\\1\\s\\Xamarin.Forms.Platform.iOS\\CollectionView\\ObservableItemsSource.cs:119 \n  at Xamarin.Forms.Platform.iOS.ObservableItemsSource.CollectionChanged (System.Object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs args) [0x000b7] in D:\\a\\1\\s\\Xamarin.Forms.Platform.iOS\\CollectionView\\ObservableItemsSource.cs:110 \n  at System.Runtime.CompilerServices.AsyncMethodBuilderCore+<>c.<ThrowAsync>b__7_0 (System.Object state) [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/Current/src/Xamarin.iOS/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/AsyncMethodBuilder.cs:1021 \n  at Foundation.NSAsyncSynchronizationContextDispatcher.Apply () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/14.0.0.0/src/Xamarin.iOS/Foundation/NSAction.cs:178 \n--- End of stack trace from previous location where exception was thrown ---\n\n  at (wrapper managed-to-native) UIKit.UIApplication.UIApplicationMain(int,string[],intptr,intptr)\n  at UIKit.UIApplication.Main (System.String[] args, System.IntPtr principal, System.IntPtr delegate) [0x00005] in /Library/Frameworks/Xamarin.iOS.framework/Versions/14.0.0.0/src/Xamarin.iOS/UIKit/UIApplication.cs:86 \n  at UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x0000e] in /Library/Frameworks/Xamarin.iOS.framework/Versions/14.0.0.0/src/Xamarin.iOS/UIKit/UIApplication.cs:65 \n  at MyApp.iOS.Application.Main (System.String[] args) [0x00001] in /Users/myname/Projects/myproject/MyApp.iOS/Main.cs:13 "

Latest XF5 preview, iOS simulator.