Got a SIGSEGV while executing native code and APP crashed

Hi, I ran myAPP.iOS on a real device. It terminated after a while and showed this in the Output.
I have no idea about what happened and how to solve. Any suggestions are very welcome. Thanks.

Thread finished: #5
Thread started: #13
The thread 'Unknown' (0x5) has exited with code 0 (0x0).
Thread finished: #11
The thread 'Unknown' (0xb) has exited with code 0 (0x0).
2017-11-16 16:53:27.492 FrontRowApp.iOS[860:45874] critical: Stacktrace:
2017-11-16 16:53:27.492 FrontRowApp.iOS[860:45874] critical: at <0xffffffff>
2017-11-16 16:53:27.496 FrontRowApp.iOS[860:45874] critical: at (wrapper managed-to-native) ObjCRuntime.Messaging.void_objc_msgSend_CATransform3D (intptr,intptr,CoreAnimation.CATransform3D) <0x00007>
2017-11-16 16:53:27.498 FrontRowApp.iOS[860:45874] critical: at CoreAnimation.CALayer.set_Transform (CoreAnimation.CATransform3D) [0x00003] in /Users/builder/data/lanes/4991/80b8487d/source/xamarin-macios/src/build/ios/native/CoreAnimation/CALayer.g.cs:2231
2017-11-16 16:53:27.501 FrontRowApp.iOS[860:45874] critical: at Xamarin.Forms.Platform.iOS.VisualElementTracker/<>c__DisplayClass23_0.b__0 () [0x003c3] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.iOS\VisualElementTracker.cs:203
2017-11-16 16:53:27.501 FrontRowApp.iOS[860:45874] critical: at Xamarin.Forms.Platform.iOS.CADisplayLinkTicker.StartThread () [0x00025] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.iOS\CADisplayLinkTicker.cs:60
2017-11-16 16:53:27.505 FrontRowApp.iOS[860:45874] critical: at System.Threading.ThreadHelper.ThreadStart_Context (object) [0x00014] in /Library/Frameworks/Xamarin.iOS.framework/Versions/10.12.0.20/src/mono/mcs/class/referencesource/mscorlib/system/threading/thread.cs:68
2017-11-16 16:53:27.506 FrontRowApp.iOS[860:45874] critical: at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool) [0x00071] in /Library/Frameworks/Xamarin.iOS.framework/Versions/10.12.0.20/src/mono/mcs/class/referencesource/mscorlib/system/threading/executioncontext.cs:957
2017-11-16 16:53:27.506 FrontRowApp.iOS[860:45874] critical: at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool) [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/10.12.0.20/src/mono/mcs/class/referencesource/mscorlib/system/threading/executioncontext.cs:904
2017-11-16 16:53:27.506 FrontRowApp.iOS[860:45874] c
ritical: at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object) [0x0002b] in /Library/Frameworks/Xamarin.iOS.framework/Versions/10.12.0.20/src/mono/mcs/class/referencesource/mscorlib/system/threading/executioncontext.cs:893
2017-11-16 16:53:27.506 FrontRowApp.iOS[860:45874] critical: at System.Threading.ThreadHelper.ThreadStart () [0x00008] in /Library/Frameworks/Xamarin.iOS.framework/Versions/10.12.0.20/src/mono/mcs/class/referencesource/mscorlib/system/threading/thread.cs:105
2017-11-16 16:53:27.508 FrontRowApp.iOS[860:45874] critical: at (wrapper runtime-invoke) object.runtime_invoke_dynamic (intptr,intptr,intptr,intptr) [0x0001e] in <75fdc35757ef4b00a24457129d1dc3e2#093595D1-4EA2-6013-3678-3D67B61EA4EE>:0
2017-11-16 16:53:27.508 FrontRowApp.iOS[860:45874] critical:
Native stacktrace:
2017-11-16 16:53:27.968 FrontRowApp.iOS[860:45874] critical: 0 FrontRowApp.iOS 0x00000001021edd88 mono_handle_native_crash + 224
2017-11-16 16:53:27.968 FrontRowApp.iOS[860:45874] critical: 1 FrontRowApp.iOS 0x00000001021f82b8 mono_sigsegv_signal_handler + 316
2017-11-16 16:53:27.968 FrontRowApp.iOS[860:45874] critical: 2 libsystem_platform.dylib 0x000000018d4f931c _sigtramp + 52
2017-11-16 16:53:27.969 FrontRowApp.iOS[860:45874] critical: 3 UIKit 0x000000019484bb3c + 1124
2017-11-16 16:53:27.969 FrontRowApp.iOS[860:45874] critical: 4 UIKit 0x00000001945a29a0 + 120
2017-11-16 16:53:27.969 FrontRowApp.iOS[860:45874] critical: 5 UIKit 0x0000000194566a38 + 120
2017-11-16 16:53:27.969 FrontRowApp.iOS[860:45874] critical: 6 UIKit 0x0000000194de2aa4 + 116
2017-11-16 16:53:27.970 FrontRowApp.iOS[860:45874] critical: 7 QuartzCore 0x0000000191754dfc + 100
2017-11-16 16:53:27.970 FrontRowApp.iOS[86
0:45874] critical: 8 QuartzCore 0x0000000191750484 + 88
2017-11-16 16:53:27.970 FrontRowApp.iOS[860:45874] critical: 9 QuartzCore 0x00000001917503fc + 172
2017-11-16 16:53:27.970 FrontRowApp.iOS[860:45874] critical: 10 QuartzCore 0x00000001917507ec + 156
2017-11-16 16:53:27.971 FrontRowApp.iOS[860:45874] critical: 11 FrontRowApp.iOS 0x000000010104a9a4 wrapper_managed_to_native_ObjCRuntime_Messaging_void_objc_msgSend_CATransform3D_intptr_intptr_CoreAnimation_CATransform3D + 244
2017-11-16 16:53:27.971 FrontRowApp.iOS[860:45874] critical: 12 FrontRowApp.iOS 0x0000000100ff1630 CoreAnimation_CALayer_set_Transform_CoreAnimation_CATransform3D + 176
2017-11-16 16:53:27.971 FrontRowApp.iOS[860:45874] critical: 13 FrontRowApp.iOS 0x00000001006d5b40 Xamarin_Forms_Platform_iOS_VisualElementTracker__c__DisplayClass23_0__OnUpdateNativeControlb
__0 + 5136
2017-11-16 16:53:27.971 FrontRowApp.iOS[860:45874] critical: 14 FrontRowApp.iOS 0x00000001006c696c Xamarin_Forms_Platform_iOS_CADisplayLinkTicker_StartThread + 332
2017-11-16 16:53:27.971 FrontRowApp.iOS[860:45874] critical: 15 FrontRowApp.iOS 0x00000001004a314c System_Threading_ThreadHelper_ThreadStart_Context_object + 188
2017-11-16 16:53:27.971 FrontRowApp.iOS[860:45874] critical: 16 FrontRowApp.iOS 0x00000001004a0ef4 System_Threading_ExecutionContext_RunInternal_System_Threading_ExecutionContext_System_Threading_ContextCallback_object_bool + 404
2017-11-16 16:53:27.972 FrontRowApp.iOS[860:45874] critical: 17 FrontRowApp.iOS 0x00000001004a0d4c System_Threading_ExecutionContext_Run_System_Threading_ExecutionContext_System_Threading_ContextCallback_object_bool + 44
2017-11-16 16:53:27.972 FrontRowApp.iOS[860:45874] critical: 18 FrontRowApp.iOS 0x00000001004a0ccc System_Threading_ExecutionC
ontext_Run_System_Threading_ExecutionContext_System_Threading_ContextCallback_object + 76
2017-11-16 16:53:27.972 FrontRowApp.iOS[860:45874] critical: 19 FrontRowApp.iOS 0x00000001004a32b4 System_Threading_ThreadHelper_ThreadStart + 52
2017-11-16 16:53:27.972 FrontRowApp.iOS[860:45874] critical: 20 FrontRowApp.iOS 0x00000001005c0b64 wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr + 244
2017-11-16 16:53:27.972 FrontRowApp.iOS[860:45874] critical: 21 FrontRowApp.iOS 0x00000001021fb2d8 mono_jit_runtime_invoke + 832
2017-11-16 16:53:27.972 FrontRowApp.iOS[860:45874] critical: 22 FrontRowApp.iOS 0x00000001022609e0 do_runtime_invoke + 108
2017-11-16 16:53:27.972 FrontRowApp.iOS[860:45874] critical: 23 FrontRowApp.iOS 0x00000001022844c0 start_wrapper + 640
2017-11-16 16:53:27.973 FrontRowApp.iOS[860:45874] critical: 24 libsystem_pthread.dylib 0x000000018d4fd68c
+ 240
2017-11-16 16:53:27.973 FrontRowApp.iOS[860:45874] critical: 25 libsystem_pthread.dylib 0x000000018d4fd59c + 0
2017-11-16 16:53:27.973 FrontRowApp.iOS[860:45874] critical: 26 libsystem_pthread.dylib 0x000000018d4facb4 thread_start + 4

2017-11-16 16:53:27.975 FrontRowApp.iOS[860:45874] critical:

Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries

used by your application.

Failed to Stop app: An error occured on client IDB450486 while executing a reply for topic xvs/idb/4.5.0.486/stop-app
The app has been terminated.
The app has been terminated.

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