Progress bar is invisible at api>=21

Question

Next progress bar shows whit progress drawable on black square if device api is less than 21, but only black square if device api is >=21

<ProgressBar
  android:id="@+id/progress"
  style="?android:attr/progressBarStyleLarge"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_gravity="center"
  android:background="@android:color/black"
  android:visibility="visible" />

In my styles I have

  <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
    <!-- Customize your theme here. -->
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
  </style>

where <color name="colorAccent">#FFFFFFFF</color>

Answer 1

It was a bug with genymtion emulator, on real devices progress bar is visible on any device