imported Audio from *.MOV > Drift !!!

while testing nuendos 7 adr capabilities i ran into a big problem:
i imported a quicktime video (DNxHD 1080p 24fps) and the imported
audio from current video shows a drift of 6-8 frames on a length of 90 min
when importing it into Nuendo…
Same Audio/Video stays in sync when imorting it into PT HD
or playing back with QT ,VLC etc.
Project settings are ok , no elastique ,
the amount of drift looks like there ISNT a pull up/down issue

System : mac pro 8-core , 48 gb , Sierra and nuendo latest , Motu Ultralite/HDX

known issue ?