IssueTracker

private static WindowInsets createWindowInsetsInstance() {
    // On API 20-28, there is no public way to create an WindowInsets instance, so we
    // need to use reflection.
    // We will first try getting the WindowInsets.CONSUMED static field, and creating a
    // copy of it
    if (!sConsumedFieldFetched) {
        try {
            sConsumedField = WindowInsets.class.getDeclaredField("CONSUMED");
        } catch (ReflectiveOperationException e) {
            Log.i(TAG, "Could not retrieve WindowInsets.CONSUMED field", e);
        }
        sConsumedFieldFetched = true;
    }
    if (sConsumedField != null) {
        try {
            WindowInsets consumed = (WindowInsets) sConsumedField.get(null);
            if (consumed != null) {
                return new WindowInsets(consumed);
            }
        } catch (ReflectiveOperationException e) {
            Log.i(TAG, "Could not get value from WindowInsets.CONSUMED field", e);
        }
    }
    // If we reached here, the WindowInsets.CONSUMED field did not exist. We can try
    // the hidden WindowInsets(Rect) constructor instead
    if (!sConstructorFetched) {
        try {
            sConstructor = WindowInsets.class.getConstructor(Rect.class);
        } catch (ReflectiveOperationException e) {
            Log.i(TAG, "Could not retrieve WindowInsets(Rect) constructor", e);
        }
        sConstructorFetched = true;
    }
    if (sConstructor != null) {
        try {
            return sConstructor.newInstance(new Rect());
        } catch (ReflectiveOperationException e) {
            Log.i(TAG, "Could not invoke WindowInsets(Rect) constructor", e);
        }
    }
    // If the reflective calls failed, return null
    return null;
}

The first method will create a copy of WindowInsets.CONSUMED, so the new instance's isConsumed will return true as well.

In contrast, the second method works fine.