Bars moving outside of concrete


I created a new file for some of our concrete components and I have noticed that sometimes the rebar shifts from inside the concrete to outside on its own. 

For example, in the video that I have attached you can see that when I make a copy of the model labelled "Panel Mk. N4" the model is created and the bars are shifted to the outside of the concrete. Then when I click on the bar and exit the command the bars shift back inside the concrete to the correct position. 

I have also noticed this issue when opening and closing other files that contain existing reinforcing. It is not just this file. 

Attached is a video of the issue.