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Created attachment 26200 [details]
Screenshots (before & after scrolling), XAML and code behind
When using a ListView with a DataTemplateSelector, cells scrolled into view appear either partially or fully blank. The bound collections are still there, since clicking the blank cells brings up the correct detail page, but it seems the cached views have been disposed.
Bypassing the DataTemplateSelector and setting the ItemTemplate to a single DataTemplate fixes the problem. Also, you won't see the issue as long as you're viewing cells that are all resolved to the same DataTemplate. It's only when you start switching between templates that the cell contents start disappearing when scrolled into view.
Note: This problem only occurs on iOS platform. Everything works as expected on Android.
- Screenshot of two types of objects (HouseholdViewModel & ChildViewModel) that resolve to different DataTemplates, before and after scrolling
- Sample ContentPage XAML and code behind of affected ListView
- Visual Studio 2017 v15.5.7
- Xamarin v4.8.118
- Xamarin.iOS SDK v18.104.22.168
- Xamarin Forms v22.214.171.1240555
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