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Started as of XF2.2 upgrade.
System.Runtime.CompilerServices.RuntimeWrappedExceptionAn object that does not derive from System.Exception has been wrapped in a RuntimeWrappedException.
at UIKit.UICollectionViewSource.GetItemsCount (UIKit.UICollectionView collectionView, nint section) <0x80408 + 0x00028> in <filename unknown>:0
at Xamarin.Forms.Layout.ShouldLayoutChildren () <0xa0a804 + 0x0011f> in <filename unknown>:0
at Xamarin.Forms.Layout.UpdateChildrenLayout () <0xa09178 + 0x0004f> in <filename unknown>:0
at Xamarin.Forms.Layout.OnSizeAllocated (Double width, Double height) <0xa0914c + 0x00013> in <filename unknown>:0
at Xamarin.Forms.Layout+<>c.<OnChildMeasureInvalidated>b__39_0 () <0xa0acac + 0x0020b> in <filename unknown>:0
at Foundation.NSAsyncActionDispatcher.Apply () <0x789f8 + 0x00027> in <filename unknown>:0
at (wrapper managed-to-native) UIKit.UIApplication:UIApplicationMain (int,string,intptr,intptr)
at UIKit.UIApplication.Main (System.String args, System.String principalClassName, System.String delegateClassName) <0x5fbe0 + 0x0009f> in <filename unknown>:0
Thank you for taking the time to submit the bug. We tried to reproduce the issue you reported but were unable given the description. If you could please attach a reproduction to the bug by starting with a clean Xamarin.Forms project and adding just the code necessary to demonstrate the issue, we would very much appreciate it.
For your convenience, we have created some reproduction best practices viewable here:
Xamarin Forms Team
Because we have not received a reply to our request for more information we are closing this issue. If you are still encountering this issue, please reopen the ticket with the requested information. Thanks!