Same problem here, everything's fine until around 6000-6500 meters. Camera immediately trails after the craft above that.
Strange thing is, when moving the camera close to the craft after that, the tanks now longer are visible, but the flight log doesn't contain any messages about the tanks having been ripped off or been destroyed in any other way. Pulling the tank into the VAB scene also spams the debug log with error messages:
[Exception]: NullReferenceException: Object reference not set to an instance of an object
I hope that helps. KSPx64 with FAR and a heap of other mods, Tantares/TantaresLV are the newest versions.
