Shape Builder deletes line sections that should stay.
I have a complex design with a bunch of overlapping parts and I'm trying to use shape builder to connect sections together. when I select all my lines, then start to build my shapes, it will start deleting lines that are not part of the shape I'm working on. Usually these lines are part of the line I'm working on, but outside of the shape I'm trying to build. The lines aren't highlighted while I'm selecting the pieces of the shape, but disappear anyway. I have tried breaking the line between the shape I'm building and the lines that I don't want deleted, but they still disappear.