Custom Base Adapter

I have created a ViewFlow that switches ImageView horizontally on swipe. Everything works fine. However i am adding a Content Description to the current ImageView so TalkBack option can read a content description. The thing is that after the 4th image TalkBack is not reading the content. What i am missing here?

Here is the setup:

viewFlow.setAdapter(new ImageAdapter(this), 0);

viewFlow xml:

<org.taptwo.android.widget.ViewFlow
    android:id="@+id/viewflow"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_alignParentBottom="true"
    android:contentDescription="@null"
    android:layout_alignParentLeft="true"
    android:layout_below="@+id/relativeLayout1"
    android:padding="3dp"
    app:sidebuffer="3" >

</org.taptwo.android.widget.ViewFlow>

image_item.xml:

<LinearLayout 
    xmlns:android="http://ift.tt/nIICcg"
    android:layout_width="fill_parent" android:isScrollContainer="true"
    android:layout_height="fill_parent" android:scrollbars="vertical"
    android:scrollbarAlwaysDrawVerticalTrack="true">

    <ImageView
        android:id="@+id/imgView"
        android:contentDescription="@null"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scaleType="fitCenter" />

</LinearLayout>

Here is the CustomAdapter:

 public class ImageAdapter extends BaseAdapter {

    private Context context;
    private LayoutInflater mInflater;


    private static final int[] ids = { 
    //These are Dummy Data dont stick to naming convention
            R.drawable.1, 
            R.drawable.2, 
            R.drawable.3, 
            R.drawable.4, 
            R.drawable.5,
            R.drawable.6, 
            R.drawable.7 };

    private static final String[] descriptions = { 
        "Content 1", 
        "Content 2", 
        "Content 3",
        "Content 4",
        "Content 5",
        "Content 6",
        "Content 7"
        };

    public ImageAdapter(Context context) {
        this.context = context;
    }

    @Override
    public int getCount() {
        return ids.length;
    }

    @Override
    public Object getItem(int position) {
        return position;
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        mInflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);


        if (convertView == null) {
            convertView = mInflater.inflate(R.layout.image_item, null);
        }

        ((ImageView) convertView.findViewById(R.id.imgView)).setContentDescription(descriptions[position]);
        ((ImageView) convertView.findViewById(R.id.imgView)).setImageResource(ids[position]);

        return convertView;
    }
    }