Latest stable version of Xamarin.Forms and Visual Studio 2019.
Stack trace shows error originates in Xamarin.Forms.Platform.iOS.ContextScrollViewDelegate. I did some research and it shows this bug was fixed long ago.
Is there a fix for this?
Stack Trace:
[0:] Outer
[0:] Outer.Message: Object reference not set to an instance of an object
[0:] Outer.Source: Xamarin.Forms.Platform.iOS
[0:] Outer.StackTrace: at Xamarin.Forms.Platform.iOS.ContextScrollViewDelegate+<>c__DisplayClass25_0.b__1 (UIKit.UIGestureRecognizer recognizer, UIKit.UIGestureRecognizer r) [0x00000] in 
\a\1\s\Xamarin.Forms.Platform.iOS\ContextScrollViewDelegate.cs:178
at UIKit.UIGestureRecognizer+_UIGestureRecognizerDelegate.ShouldRecognizeSimultaneously (UIKit.UIGestureRecognizer gestureRecognizer, UIKit.UIGestureRecognizer otherGestureRecognizer) [0x0000a] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.10.0.153/src/Xamarin.iOS/UIKit/UIGestureRecognizer.g.cs:908
at (wrapper managed-to-native) UIKit.UIApplication.UIApplicationMain(int,string[],intptr,intptr)
at UIKit.UIApplication.Main (System.String[] args, System.IntPtr principal, System.IntPtr delegate) [0x00005] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.10.0.153/src/Xamarin.iOS/UIKit/UIApplication.cs:86
at UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x0000e] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.10.0.153/src/Xamarin.iOS/UIKit/UIApplication.cs:65
at XamAppGrandLife.iOS.Application.Main (System.String[] args) [0x00002] in C:\Development\GLH\Administration\XamAppGrandLife\XamAppGrandLife.iOS\Main.cs:15