Sorry for the delay in my answer, but I was doing tests and it was the first one on my list. The project was completely new, the only asset I had was that structure. As for the steps, BenVlodgi did the same thing as me, just adding a struct variable as an any kind of actor then trying to save the structure. Here are screen shots for before and after save :
I was able to reproduce this issue on our end. I have written up a a report and I have submitted it to the developers for further consideration. I have provided a link to the public tracker. Please feel free to use the link provided for future updates.