Toggling IsVisible on MaterialCard will remove elevation in iOS

[ramonB1996]

🐛 Bug Report

When you use a MaterialCard and have an Elevation value on it, then this elevation will disappear when toggling IsVisible to false and then back to true via BindableProperties. This only happens on iOS.

Expected behavior

MaterialCard and Elevation will stay the same, even when hiding/showing multiple times.

Reproduction steps

Step 1: Create a Control with a MaterialCard and put an Elevation value of '2' on it. Step 2: Consume this Control in your View. Step 3: Bind to the IsVisible property of that control within your ViewModel for that View. Step 4: Toggle the IsVisible to false and then back to true. Step 5: You should have seen the bug now!

Configuration

• IPhone XR with iOS 14.0
• Xamarin Forms: v4.8.0.1687 (latest stable)
• Xamarin.Forms.Visual.Material: v4.8.0.1687 (latest stable)

Version: 1.7.4 (latest stable)

Platform:

• [x] :iphone: iOS
• [ ] :robot: Android
• [ ] :checkered_flag: WPF
• [ ] :earth_americas: UWP
• [ ] :apple: MacOS
• [ ] :tv: tvOS
• [ ] :monkey: Xamarin.Forms