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Exception in Navigation Bar Back Button

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Hi Friends.
I'm on android (iOS, no problem)
I have a "navigation page" root page
I do a pushAsync to open a child page.
If I press the back button present in the navigation bar, I have this exception (I don't have this exception if I press the hardware button)

[ViewGroup] addInArray been called, this = com.android.internal.view.menu.ActionMenuView{41dd41c8 V.ED.... ......ID 600,0-600,56}call stack =
[ViewGroup] java.lang.Throwable: addInArray
[ViewGroup] at android.view.ViewGroup.addInArray(ViewGroup.java:3786)
[ViewGroup] at android.view.ViewGroup.addViewInner(ViewGroup.java:3740)
[ViewGroup] at android.view.ViewGroup.addView(ViewGroup.java:3564)
[ViewGroup] at android.view.ViewGroup.addView(ViewGroup.java:3509)
[ViewGroup] at com.android.internal.view.menu.BaseMenuPresenter.addItemView(BaseMenuPresenter.java:129)
[ViewGroup] at com.android.internal.view.menu.BaseMenuPresenter.updateMenuView(BaseMenuPresenter.java:103)
[ViewGroup] at com.android.internal.view.menu.ActionMenuPresenter.updateMenuView(ActionMenuPresenter.java:232)
[ViewGroup] at com.android.internal.view.menu.MenuBuilder.dispatchPresenterUpdate(MenuBuilder.java:244)
[ViewGroup] at com.android.internal.view.menu.MenuBuilder.onItemsChanged(MenuBuilder.java:946)
[ViewGroup] at com.android.internal.view.menu.MenuBuilder.startDispatchingItemsChanged(MenuBuilder.java:969)
[ViewGroup] at com.android.internal.policy.impl.PhoneWindow.preparePanel(PhoneWindow.java:494)
[ViewGroup] at com.android.internal.policy.impl.PhoneWindow.doInvalidatePanelMenu(PhoneWindow.java:826)
[ViewGroup] at com.android.internal.policy.impl.PhoneWindow$1.run(PhoneWindow.java:236)
[ViewGroup] at android.view.Choreographer$CallbackRecord.run(Choreographer.java:788)
[ViewGroup] at android.view.Choreographer.doCallbacks(Choreographer.java:591)
[ViewGroup] at android.view.Choreographer.doFrame(Choreographer.java:559)
[ViewGroup] at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:774)
[ViewGroup] at android.os.Handler.handleCallback(Handler.java:808)
[ViewGroup] at android.os.Handler.dispatchMessage(Handler.java:103)
[ViewGroup] at android.os.Looper.loop(Looper.java:193)
[ViewGroup] at android.app.ActivityThread.main(ActivityThread.java:5292)
[ViewGroup] at java.lang.reflect.Method.invokeNative(Native Method)
[ViewGroup] at java.lang.reflect.Method.invoke(Method.java:515)
[ViewGroup] at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:824)
[ViewGroup] at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:640)
[ViewGroup] at dalvik.system.NativeStart.main(Native Method)


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