A) Both the attached versions of this project (which are almost identical) have 2 clipping planes, assigned to the layer with that name, located where the sections are, but they have become invisible and unselectable in the second version of the project. One can be seen to be active in the front view in both projects, and now I don’t know how to make them active anywhere else.
B) The other significant difference between the two versions of this project attached at the end of this post is that an incremental save somehow caused the VaObject bed to arbitrarily scale up. I had the same experience last week with objects inserted in the Savoie tutorial model.
Before the save:
After the save: