Xamarin.Forms - Force ListView layout to redraw

The height of the cells aren't recalculated by default because it is an expensive process. If you want to force a re-size you need to call ForceUpdateSize() on the cell.

NOTE: This does not work on older versions of Xamarin Forms. It was added in 2.0.0.0, but try updating to at least 2.2.0.31

Set your CachingStrategy="RetainElement", it's expensive, but will force an update a lot more. If your list isn't too long, you won't notice.

I've noticed that if a cell is visible, even though bound to an obserablecollection, that cell doesn't update until I scroll up then down.

I've had terrible luck getting native controls to redraw. The one thing that has worked for me has been in a custom renderer: ((IVisualElementController)Element).NativeSizeChanged()