Video not playing correct

Hi, plz help !

When importing a .mov file into Nuendo and press play, the movie starts but after a second or so IT STARTS AGAIN.
if i extract the sound from the film i can see that the audio starts on time, however because the movie is somehow shifted due to the issue i’m describing, the audio and video doesn’t play in sync.

if i play the movie in quicktime or vlc it is okay and there isn’t any glitch, only when played from Nuendo (BTW it’s the same with N7).

The movie is 29.97FPS, and settings in Nuendo match.

any help would be greatly appreciated.