Hi Jonas,
We also have some issues with the camera view in the beta regardless of the device. The video streaming is unstable at the moment. Sometimes it works and then it is interrupted, we hope that it will be fixed with new versions of the DJI SDK.
Also make sure that the DJI Go app in not running in the background. It can interfere with the Capture App.
Note that we have just released a new beta version, v2.0.5. Make sure to try with this version. More information here about the beta:
https://community.pix4d.com/t/4828
Let us know if it works better!
Best regards,