When creating 3D sections some solids randomly disappear from screen.
I create sections from 3D drawings using the section plane command > orthographic > front. Until here everything goes fine and Autocad behaves as expected.
As soon as I add a jog to the section plane, some (not necessarily all) solids, which do not touch the section plane, will disappear. Depending on the position of the section plane the missing objects can vary.
To avoid this behavior I usually create a copy of my drawing and merge all solids into one solid union with the result that all parts of the drawing are touching the section plane inevitably.
That's how it looks:
That's how it should look: