Video Clips not playing in full screen CasparCG 220

Hi,

We use CasparCG Server/Client 220 for outputting ( display port) video on big screens. When I set the output window to be full screen, the video freezes unless we press Windows key or put any other windows on top of the Caspar full screen window. This does not happen when is set to true. Videos can be seen playing in the small Caspar output window. Blow is the syntax of the config xml. Thank you!

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <paths>
    <media-path>media\</media-path>
    <log-path>debug\</log-path>
    <data-path>data\</data-path>
    <template-path>templates\</template-path>
    <thumbnails-path>thumbnails\</thumbnails-path>
  </paths>
  <!--<log-level>debug</log-level>-->
  <channels>
    <channel>
      <video-mode>1080i5000</video-mode>
      <consumers>
        <screen>
          <device>1</device>
          <stretch>fill</stretch>
          <windowed>false</windowed>
        </screen>
      </consumers>
    </channel>
  </channels>
  <controllers>
    <tcp>
        <port>5250</port>
        <protocol>AMCP</protocol>
    </tcp>
  </controllers>
</configuration>

Cheers,

Jeff
Caspar config

That sounds more like a performance or GPU problem, as the config looks ok. What are your system specs?