Consistency error: you are calling a UIKit method that can only be invoked from the UI thread.

Got an issue report from Insights. Can't find any clue about this. Please advise.!

UIKit.UIKitThreadAccessExceptionUIKit Consistency error: you are calling a UIKit method that can only be invoked from the UI thread.
at UIKit.UIApplication.EnsureUIThread () [0x00023] in /Users/builder/data/lanes/1977/2c66d2fe/source/maccore/src/UIKit/UIApplication.cs:71
at UIKit.UINavigationController.get_TopViewController () [0x00000] in /Users/builder/data/lanes/1977/2c66d2fe/source/maccore/src/build/ios/native/UIKit/UINavigationController.g.cs:547
at Xamarin.Forms.Platform.iOS.NavigationRenderer+d__28.MoveNext () [0x00058] in :0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000b] in /Users/builder/data/lanes/1977/2c66d2fe/source/mono/mcs/class/corlib/System.Runtime.ExceptionServices/ExceptionDispatchInfo.cs:61
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/1977/2c66d2fe/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:201
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/1977/2c66d2fe/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:170
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/1977/2c66d2fe/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:142
at System.Runtime.CompilerServices.TaskAwaiter

1[System.Boolean].GetResult () [0x00000] in /Users/builder/data/lanes/1977/2c66d2fe/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:372 
  at Xamarin.Forms.NavigationPage+<PopAsyncInner>d__23.MoveNext () [0x00110] in <filename unknown>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000b] in /Users/builder/data/lanes/1977/2c66d2fe/source/mono/mcs/class/corlib/System.Runtime.ExceptionServices/ExceptionDispatchInfo.cs:61 
  at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/1977/2c66d2fe/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:201 
  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/1977/2c66d2fe/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:170 
  at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/1977/2c66d> 2fe/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:142 
  at System.Runtime.CompilerServices.TaskAwaiter

1[Xamarin.Forms.Page].GetResult () [0x00000] in /Users/builder/data/lanes/1977/2c66d2fe/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:372
at Xamarin.Forms.NavigationPage+d__1b.MoveNext () [0x001ef] in :0