Content of a frame that is the View of a ViewCell appear on top of other rows in the list - iOS only

Hi,

I updated to the latest Xamarin.Forms version (4.7.0.1080) and now a list view I have in my project is totally messed up - the template of the list view is set to a custom view cell that it's View is set to a frame and now the content of the rows appear on top of each other.
I found this same problem in this sample - https://docs.microsoft.com/en-us/samples/xamarin/xamarin-forms-samples/boxview-listviewcolors (see screenshot)

Does anyone have a fix for this problem?

Thanks!