ImageButton onClick not called in RelativeLayout in a Fragment using a transparent ActionBar

any ideas why my ImageButton isn't working in my Fragment? The ImageButton contains a Drawable and is transparent. When I place it in my RelativeLayout below, its working...

<RelativeLayout
android:id="@+id/rl_newsdet_root"
xmlns:android="http://schemas.android.com/apk/res/android"
android:background="@drawable/bg"
android:focusableInTouchMode="true"
android:layout_width="match_parent"
android:layout_height="match_parent">

<TextView
    android:id="@+id/tv_newsdet_title"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textColor="@color/white"
    android:layout_marginTop="7dp"
    android:textSize="20sp"
    android:layout_centerHorizontal="true"
    />

<ImageButton
    android:id="@+id/btn_newsdet_back"
    android:layout_marginLeft="10dp"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:clickable="true"
    android:src="@drawable/bt_back"
    />

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_marginTop="?android:attr/actionBarSize"
    android:background="@color/white"
    android:gravity="left"
    >
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/tv_newsdet_name"
        android:textSize="18sp"
        android:layout_marginLeft="10dp"
        android:layout_marginTop="5dp"
        android:textStyle="bold"
        android:textColor="@color/cyan"
        android:background="@color/grey"
        android:paddingLeft="1dp"
        android:paddingRight="1dp" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/tv_newsdet_time"
        android:textColor="@color/white"
        android:textSize="18sp"
        android:layout_toRightOf="@+id/tv_newsdet_name"
        android:paddingLeft="1dp"
        android:paddingRight="1dp"
        android:background="@color/grey"
        android:layout_marginTop="5dp" />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="New Text"
    android:id="@+id/tv_newsdet_text"
    android:layout_marginLeft="10dp"
    android:layout_marginTop="1dp"
    android:layout_below="@+id/tv_newsdet_name"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true" />
</RelativeLayout>

My onClickListener with AndroidAnnotations

 @ViewById
 ImageButton btn_newsdet_back;


    @Click(R.id.btn_newsdet_back)
    void back() {
       Log.i(TAG,"back");
       mActivity.popFragments();
    }

EDIT onClick is working (called), when its below the TextView. Can anybody explain why?