IDX 2026X-FD03 - Sections disappearing

When I am creating sections, I pick the mesh add it as a new section, Plane direction, count 1 select the plane, no section. Keeps doing this.

Worse though, is that when I save and then close down file and reopen, all my sections have been deleted except the last one.. Video shows this.

What does this option in Preferences do?

 

Nick McferranSylvain CarreThomas Frison