VisualElementRenderer`1[TElement].OnTouchEvent throws System.NullReferenceException

[dharamhbtik]

we are overriding DispatchTouchEvent in the main activity and doing some operation on MotionEventActions.Down, MotionEventActions.Cancel, and MotionEventActions.Up
but randomly it is throwing error and sometime it is crashing the app.
Below is the crash log

VisualElementRenderer`1[TElement].OnTouchEvent (Android.Views.MotionEvent e)
System.NullReferenceException: Object reference not set to an instance of an object

VisualElementRenderer`1[TElement].OnTouchEvent (Android.Views.MotionEvent e)
Platform+DefaultRenderer.OnTouchEvent (Android.Views.MotionEvent e)
View.n_OnTouchEvent_Landroid_view_MotionEvent_ (System.IntPtr jnienv, System.IntPtr native__this, System.IntPtr native_e)
JNINativeWrapper.Wrap_JniMarshal_PPL_Z (_JniMarshal_PPL_Z callback, System.IntPtr jnienv, System.IntPtr klazz, System.IntPtr p0)

and here is error we are capturing which is not crashing the app

MainActivity.DispatchTouchEvent (Android.Views.MotionEvent ev)
System.NullReferenceException: Object reference not set to an instance of an object

Xamarin.Forms.Platform.Android
VisualElementRenderer`1[TElement].OnTouchEvent (Android.Views.MotionEvent e)
Xamarin.Forms.Platform.Android
Platform+DefaultRenderer.OnTouchEvent (Android.Views.MotionEvent e)
Android.Views
View.n_OnTouchEvent_Landroid_view_MotionEvent_ (System.IntPtr jnienv, System.IntPtr native__this, System.IntPtr native_e)
Android.Runtime
JNINativeWrapper.Wrap_JniMarshal_PPL_Z (_JniMarshal_PPL_Z callback, System.IntPtr jnienv, System.IntPtr klazz, System.IntPtr p0)
Java.Interop
JniEnvironment+InstanceMethods.CallNonvirtualBooleanMethod (Java.Interop.JniObjectReference instance, Java.Interop.JniObjectReference type, Java.Interop.JniMethodInfo method, Java.Interop.JniArgumentValue* args)
Java.Interop
JniPeerMembers+JniInstanceMethods.InvokeVirtualBooleanMethod (System.String encodedMember, Java.Interop.IJavaPeerable self, Java.Interop.JniArgumentValue* parameters)
Android.Views
View.DispatchTouchEvent (Android.Views.MotionEvent e)
Xamarin.Forms.Platform.Android
VisualElementRenderer`1[TElement].DispatchTouchEvent (Android.Views.MotionEvent e)
Xamarin.Forms.Platform.Android
Platform+DefaultRenderer.DispatchTouchEvent (Android.Views.MotionEvent e)
Android.Views
View.n_DispatchTouchEvent_Landroid_view_MotionEvent_ (System.IntPtr jnienv, System.IntPtr native__this, System.IntPtr native_e)
Android.Runtime
JNINativeWrapper.Wrap_JniMarshal_PPL_Z (_JniMarshal_PPL_Z callback, System.IntPtr jnienv, System.IntPtr klazz, System.IntPtr p0)
Java.Interop
JniEnvironment+InstanceMethods.CallNonvirtualBooleanMethod (Java.Interop.JniObjectReference instance, Java.Interop.JniObjectReference type, Java.Interop.JniMethodInfo method, Java.Interop.JniArgumentValue* args)
Java.Interop
JniPeerMembers+JniInstanceMethods.InvokeVirtualBooleanMethod (System.String encodedMember, Java.Interop.IJavaPeerable self, Java.Interop.JniArgumentValue* parameters)
Android.Views
View.DispatchTouchEvent (Android.Views.MotionEvent e)
Xamarin.Forms.Platform.Android
VisualElementRenderer`1[TElement].DispatchTouchEvent (Android.Views.MotionEvent e)
Xamarin.Forms.Platform.Android
Platform+DefaultRenderer.DispatchTouchEvent (Android.Views.MotionEvent e)
Android.Views
View.n_DispatchTouchEvent_Landroid_view_MotionEvent_ (System.IntPtr jnienv, System.IntPtr native__this, System.IntPtr native_e)
Android.Runtime
JNINativeWrapper.Wrap_JniMarshal_PPL_Z (_JniMarshal_PPL_Z callback, System.IntPtr jnienv, System.IntPtr klazz, System.IntPtr p0)
Java.Interop
JniEnvironment+InstanceMethods.CallNonvirtualBooleanMethod (Java.Interop.JniObjectReference instance, Java.Interop.JniObjectReference type, Java.Interop.JniMethodInfo method, Java.Interop.JniArgumentValue* args)
Java.Interop
JniPeerMembers+JniInstanceMethods.InvokeVirtualBooleanMethod (System.String encodedMember, Java.Interop.IJavaPeerable self, Java.Interop.JniArgumentValue* parameters)
Android.Views
View.DispatchTouchEvent (Android.Views.MotionEvent e)
Xamarin.Forms.Platform.Android
VisualElementRenderer`1[TElement].DispatchTouchEvent (Android.Views.MotionEvent e)
Xamarin.Forms.Platform.Android
Platform+DefaultRenderer.DispatchTouchEvent (Android.Views.MotionEvent e)
Android.Views
View.n_DispatchTouchEvent_Landroid_view_MotionEvent_ (System.IntPtr jnienv, System.IntPtr native__this, System.IntPtr native_e)
Android.Runtime
JNINativeWrapper.Wrap_JniMarshal_PPL_Z (_JniMarshal_PPL_Z callback, System.IntPtr jnienv, System.IntPtr klazz, System.IntPtr p0)
Java.Interop
JniEnvironment+InstanceMethods.CallNonvirtualBooleanMethod (Java.Interop.JniObjectReference instance, Java.Interop.JniObjectReference type, Java.Interop.JniMethodInfo method, Java.Interop.JniArgumentValue* args)
Java.Interop
JniPeerMembers+JniInstanceMethods.InvokeVirtualBooleanMethod (System.String encodedMember, Java.Interop.IJavaPeerable self, Java.Interop.JniArgumentValue* parameters)
Android.Views
View.DispatchTouchEvent (Android.Views.MotionEvent e)
Xamarin.Forms.Platform.Android
VisualElementRenderer`1[TElement].DispatchTouchEvent (Android.Views.MotionEvent e)
Xamarin.Forms.Platform.Android
Platform+DefaultRenderer.DispatchTouchEvent (Android.Views.MotionEvent e)
Android.Views
View.n_DispatchTouchEvent_Landroid_view_MotionEvent_ (System.IntPtr jnienv, System.IntPtr native__this, System.IntPtr native_e)
Android.Runtime
JNINativeWrapper.Wrap_JniMarshal_PPL_Z (_JniMarshal_PPL_Z callback, System.IntPtr jnienv, System.IntPtr klazz, System.IntPtr p0)
Java.Interop
JniEnvironment+InstanceMethods.CallNonvirtualBooleanMethod (Java.Interop.JniObjectReference instance, Java.Interop.JniObjectReference type, Java.Interop.JniMethodInfo method, Java.Interop.JniArgumentValue* args)
Java.Interop
JniPeerMembers+JniInstanceMethods.InvokeVirtualBooleanMethod (System.String encodedMember, Java.Interop.IJavaPeerable self, Java.Interop.JniArgumentValue* parameters)
Android.Views
View.DispatchTouchEvent (Android.Views.MotionEvent e)
Xamarin.Forms.Platform.Android
VisualElementRenderer`1[TElement].DispatchTouchEvent (Android.Views.MotionEvent e)
Xamarin.Forms.Platform.Android
Platform+DefaultRenderer.DispatchTouchEvent (Android.Views.MotionEvent e)
Android.Views
View.n_DispatchTouchEvent_Landroid_view_MotionEvent_ (System.IntPtr jnienv, System.IntPtr native__this, System.IntPtr native_e)
Android.Runtime
JNINativeWrapper.Wrap_JniMarshal_PPL_Z (_JniMarshal_PPL_Z callback, System.IntPtr jnienv, System.IntPtr klazz, System.IntPtr p0)
Java.Interop
JniEnvironment+InstanceMethods.CallNonvirtualBooleanMethod (Java.Interop.JniObjectReference instance, Java.Interop.JniObjectReference type, Java.Interop.JniMethodInfo method, Java.Interop.JniArgumentValue* args)
Java.Interop
JniPeerMembers+JniInstanceMethods.InvokeVirtualBooleanMethod (System.String encodedMember, Java.Interop.IJavaPeerable self, Java.Interop.JniArgumentValue* parameters)
Android.Views
View.DispatchTouchEvent (Android.Views.MotionEvent e)
Xamarin.Forms.Platform.Android
VisualElementRenderer`1[TElement].DispatchTouchEvent (Android.Views.MotionEvent e)
Android.Views
View.n_DispatchTouchEvent_Landroid_view_MotionEvent_ (System.IntPtr jnienv, System.IntPtr native__this, System.IntPtr native_e)
Android.Runtime
JNINativeWrapper.Wrap_JniMarshal_PPL_Z (_JniMarshal_PPL_Z callback, System.IntPtr jnienv, System.IntPtr klazz, System.IntPtr p0)
Java.Interop
JniEnvironment+InstanceMethods.CallNonvirtualBooleanMethod (Java.Interop.JniObjectReference instance, Java.Interop.JniObjectReference type, Java.Interop.JniMethodInfo method, Java.Interop.JniArgumentValue* args)
Java.Interop
JniPeerMembers+JniInstanceMethods.InvokeVirtualBooleanMethod (System.String encodedMember, Java.Interop.IJavaPeerable self, Java.Interop.JniArgumentValue* parameters)
Android.Views
View.DispatchTouchEvent (Android.Views.MotionEvent e)
Xamarin.Forms.Platform.Android
VisualElementRenderer`1[TElement].DispatchTouchEvent (Android.Views.MotionEvent e)
Android.Views
View.n_DispatchTouchEvent_Landroid_view_MotionEvent_ (System.IntPtr jnienv, System.IntPtr native__this, System.IntPtr native_e)
Android.Runtime
JNINativeWrapper.Wrap_JniMarshal_PPL_Z (_JniMarshal_PPL_Z callback, System.IntPtr jnienv, System.IntPtr klazz, System.IntPtr p0)
Java.Interop
JniEnvironment+InstanceMethods.CallNonvirtualBooleanMethod (Java.Interop.JniObjectReference instance, Java.Interop.JniObjectReference type, Java.Interop.JniMethodInfo method, Java.Interop.JniArgumentValue* args)
Java.Interop
JniPeerMembers+JniInstanceMethods.InvokeVirtualBooleanMethod (System.String encodedMember, Java.Interop.IJavaPeerable self, Java.Interop.JniArgumentValue* parameters)
Android.Views
View.DispatchTouchEvent (Android.Views.MotionEvent e)
Xamarin.Forms.Platform.Android
PlatformRenderer.DispatchTouchEvent (Android.Views.MotionEvent e)
Android.Views
View.n_DispatchTouchEvent_Landroid_view_MotionEvent_ (System.IntPtr jnienv, System.IntPtr native__this, System.IntPtr native_e)
Android.Runtime
JNINativeWrapper.Wrap_JniMarshal_PPL_Z (_JniMarshal_PPL_Z callback, System.IntPtr jnienv, System.IntPtr klazz, System.IntPtr p0)
Java.Interop
JniEnvironment+InstanceMethods.CallNonvirtualBooleanMethod (Java.Interop.JniObjectReference instance, Java.Interop.JniObjectReference type, Java.Interop.JniMethodInfo method, Java.Interop.JniArgumentValue* args)
Java.Interop
JniPeerMembers+JniInstanceMethods.InvokeVirtualBooleanMethod (System.String encodedMember, Java.Interop.IJavaPeerable self, Java.Interop.JniArgumentValue* parameters)
Android.App
Activity.DispatchTouchEvent (Android.Views.MotionEvent ev)
MyNiceApp.Droid
MainActivity.DispatchTouchEvent (Android.Views.MotionEvent ev)

[ZakariaBakhkhouch]

Can you share the code of the DispatchTouchEvent method in the MainActivityCalss to identify where the null reference exception is occurring?