iOS: when ListView items added/removed, items occasionally not rendered

Hi all,

Just wondering if anyone else has seen this strange behavior: it occurs only on iOS when items are added and removed from an ObservableCollection bound to a ListView. Occassionally, items are not rendered.

See screenshot - second item:

I'm using a ViewCell with a Grid inside to layout some labels and a button. The underlying view model is definitely OK, and if I tap on the cell then it still executes the ItemTapped event properly.

I haven't managed to successfully isolate the bug in a test app yet. Just wondering if anyone else has seen this?