title: nested scrollview + recyclerview, strange autoscroll behaviour
body: <p>In a view pager I have several fragments, one of them uses a nested scrollview with a header and a recyclerview : </p>
  
  <pre><code>&lt;android.support.v4.widget.NestedScrollView
      xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto"
      xmlns:tools="http://schemas.android.com/tools"
      android:id="@+id/scrollview"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:fillViewport="true"
      app:layout_behavior="@string/appbar_scrolling_view_behavior"
      tools:context="com.m360.android.fragment.Members.MemberDetailsFragment"&gt;
  
      &lt;LinearLayout
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:orientation="vertical"
          android:paddingTop="20dp"&gt;
  
          &lt;header/&gt;
  
          &lt;android.support.v7.widget.RecyclerView
              android:id="@+id/recycler"
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:clipToPadding="false"
              android:paddingTop="0dp" /&gt;
  
      &lt;/LinearLayout&gt;
  
  &lt;/android.support.v4.widget.NestedScrollView&gt;
  </code></pre>
  
  <p>The tag "header" represents a complex layout that I didn't want to post here as it stretches out the code a lot.</p>
  
  <p>when I switch between the tabs, it scrolls strait to the recycler view. The header is hidden, I have to scroll up to see it.</p>
  
  <p>Any ideas on what causes that ? I don't wanna use a type in my adapter if I can avoid it.</p>