You have created an assembly defining one part as Reference.
Then, creating a drawing with the assembly views you notice that the reference part is not hidden by the other components and vice versa.
So, if you want that the non-reference body hides the reference one and vice versa, you need to do the following.
- Edit the view
- In the Model State tab, set the Hidden Line Calculation for the Reference Data to “All Bodies”
After that, the views display as expected.