Autogenerator test Espresso

I created a simple test using espresso recording, the textview value will change when the "Hello World" button is clicked on "Button Clicked!" The generated code looks like this:

public class MainActivityTest {

    @Rule
    public ActivityTestRule<MainActivity> mActivityTestRule = new ActivityTestRule<>(MainActivity.class);

    @Test
    public void mainActivityTest() {
        ViewInteraction textView = onView(
                allOf(withId(R.id.tv), withText("Hello World!"),
                        childAtPosition(
                                childAtPosition(
                                        withId(android.R.id.content),
                                        0),
                                1),
                        isDisplayed()));
        textView.check(matches(withText("Hello World!")));

        ViewInteraction button = onView(
                allOf(withId(R.id.button), withText("Button"), isDisplayed()));
        button.perform(click());

        ViewInteraction textView2 = onView(
                allOf(withId(R.id.tv), withText("Button Clicked!!"),
                        childAtPosition(
                                childAtPosition(
                                        withId(android.R.id.content),
                                        0),
                                1),
                        isDisplayed()));
        textView2.check(matches(withText("Button Clicked!!")));

    }

    private static Matcher<View> childAtPosition(
            final Matcher<View> parentMatcher, final int position) {

        return new TypeSafeMatcher<View>() {
            @Override
            public void describeTo(Description description) {
                description.appendText("Child at position " + position + " in parent ");
                parentMatcher.describeTo(description);
            }

            @Override
            public boolean matchesSafely(View view) {
                ViewParent parent = view.getParent();
                return parent instanceof ViewGroup && parentMatcher.matches(parent)
                        && view.equals(((ViewGroup) parent).getChildAt(position));
            }
        };
    }
}

      

        
        
        
      

    

This test will fail

android.support.test.espresso.NoMatchingViewException: no views in found hierarchy: (with id: com.mysampleapps.mytestproject: id / tv and with text: "Hello World!" and Child at position 1 in parent Child at position 0 at parent with id: android: id / content and is displayed on the screen to the user)

If I remove the "child" from the test case as

public void mainActivityTest() {
        ViewInteraction textView = onView(
                allOf(withId(R.id.tv), withText("Hello World!"),
                        isDisplayed()));
        textView.check(matches(withText("Hello World!")));

        ViewInteraction button = onView(
                allOf(withId(R.id.button), withText("Button"), isDisplayed()));
        button.perform(click());

        ViewInteraction textView2 = onView(
                allOf(withId(R.id.tv), withText("Button Clicked!!"),
                        isDisplayed()));
        textView2.check(matches(withText("Button Clicked!!")));

    }

      

        
        
        
      

    

It will work fine now.

Is this an espresso bug?