Strange slow video playback problem in ZDMC 19.4

Hi,
No matter what video file I play in ZDMC 19.4 (and in previous version as well), there is a playback problem.
The video seems to play slower then the audio - a person speaks and his mouth moves unnaturally slow
Trying to change audio-picture sync is not helping since the video is like slow motion

When using HomeTheater it is fine

any Ideas?

Thanks!

 

Is the option in ZDMC "Play video with external player" activated?

 

No,
But this will use the same player as HomeTheater, no?
Not KODI default player

 

When you activate this option, ZDMC will use the Zidoo Player (like Home Theater). So this should be activated.

 

I I will try that
However, I have Z9s for few years and never used it, everything was fine

 

I don't see a key connected to the USB ports while it is viewed using HomeTheater or other