WMF audio playback bug

If i use wmf plugin as a backend, when i play a mp3 file which is smaller than 2000ms usually it's jumping to end of file middle of playing, if i play it again, it plays normally that can be repeatable, if i play it again it's gonna jump middle of playing again.

If i use dsengine plugin as a backend there is no such a problem.

Here is the simple test code, you can see it jumps 0 to 2.088 when you play first time, then if you play it again you will see correctly 0 > 0.9x > 2.088 plays audio file.

UPDATE: We noticed this problem is not regarding length of audio, even if we have some mp3 files which are about 5 seconds wmf plugin is not playing them correctly, it looks like wmf not able to play some mp3 files, anyway there is one more file i'm adding wmf plugin is playing this correctly.

import QtQuick 2.1
import QtMultimedia 5.0

Rectangle {
    id: rect
    width: 640
    height: 240

    Audio {
        id: player
        source: "file:///test.mp3"
    }

    MouseArea {
        anchors.fill: parent

        onClicked: {
            player.play();
        }
    }

    Rectangle {
        anchors { top: parent.top; left: parent.left; bottom: parent.bottom }
        color: "red"
        width: (player.position/player.duration) * rect.width
    }

    Text {
        anchors.fill: parent
        text: player.position/1000
        fontSizeMode: Text.Fit; minimumPointSize: 8; font.pointSize: 96
        horizontalAlignment: Text.AlignHCenter
        verticalAlignment: Text.AlignVCenter
    }
}