Thanks Juancho for the additional information.
If your source is streaming which requires network connection e.g. to internet this can happen. It did to me when I was using a PC/USB based system . However the cause in my case would not be applicable to mac as it was a problem arising from ASIO or WASAPI sessions and related only to 24/192 streamed files. There are also issues which may arise if you are using mac as a server to send locally stored files to Bartok. If you are doing this with network connection then please ensure that you use compatible UPnP server software ( e.g. MinimServer) as use of others may result in unpredictable behaviour.
Anyway there is something which , in your set up, is unique to USB replay - the Innuos Phoenix. What does the Phoenix do? It is a USB conditioning device which re-times the incoming data before sending it to your DAC !. So you therefore have a timing problem with USB connection that does not occur with ethernet connection .
Although I cannot guarantee that this is the root of your issue it is logically the first thing to investigate. Perhaps there is a setting with the Phoenix that needs attention or it is faulty? Whatever I now think that the answer may not lie here in the first place but with Innuos to whom I would suggest that you now direct your question.
The movie sound issue may not be related if you were taking the audio feed from a TV’s digital output. There are known issues with some TV brands due to the way that they have implemented those outputs compared with dCS’ very tight input specifications which are necessary in order to ensure the highest quality of sound.