MediaPlayer's position value becomes larger than the duration value.

When I play the video (000_out.mp4) using the attached sample (liveWithVideoOutput), the value of the position property of MediaPlayer sometimes exceeds the value of the duration property.
This phenomenon does not always occur, but it does occur when the video is played repeatedly.
It also occurred on Windows 10, but not on Linux.

The reproduced environment is as follows
・OS: Windows 10 64bit
・Qt: 5.15.5 msvc2019 64bit

The reproduction procedure is as follows.
[1] Build and run the sample. liveWithVideoOutput_20210927.zip
[2] Wait for about 30 minutes.

In addition, I checked the differences in the backend settings and found the following.
・When the backend is set to directshow, the symptom does not occur even after waiting for 13 hours.
　※ I set it with qputenv("QT_MULTIMEDIA_PREFERRED_PLUGINS", "directshow")
・When set to windowsmediafoundation, the symptom occurs within a few minutes.

Based on the above, there may be some problem in the process related to Windows MediaFoundation.
Please investigate the cause.