I'm sure this is a bug in 2013 Sp1.1.
When sectioning a view with frame generator members in the background that show as hidden line style, the FG members sometimes dont show up. I have been testing and think I found the problem and it's related to the dashed hidden line style.
In the image below, if the section line is initially placed at A and it is inbetween the dashes of the hidden line, then the FG members dont show up in the section view. If you initially place it at B where it intersects the non dashed part of the line then they show up. If I drag the section line at A to B, the the section updates and shows all FG members. If I then drag it back to A, the FG members stay visible. So the bug seems to be that if the section line initially crosses the spaces, the the FG members wont show.
It is easy to not pick up missing items so can we have a hotfix please.