Devendra Badgujar
Forum Moderator

Hello Benjamin P.

I was able to reproduce it at my end, but I can see that this behavior is seen when you are trying to copy and paste the body. When you do this, it takes into account the initial solid object with its material properties. This is same when you have solids in component and try copy pasting that. 

The possible way to avoid this would be to copy an object using move tool. That is, Press Ctrl to copy the object selected for movement and place it at the location at which you drag or dimension the move.

Let me know if you have further questions on this.