When I export my journal to a PDF file (using File ➔ Export ➔ Image Format PDF), the spec limits disappear from some of my plots. Here's a plot from within my journal:

And here's the same plot in the PDF after export:

The journal (and the PDF) have quite a few more plots, and when I look at the log after export, I see this:
Interactive HTML: Unsupported display type: PageBreakBox
Interactive HTML: Unsupported display type: ParallelAxisSeg
Interactive HTML: Unsupported display type: ColBox
Interactive HTML: Unsupported display type: PageBreakBox
Interactive HTML: Controls are not interactive.
Interactive HTML: Unsupported display type: ParallelAxisSeg
Interactive HTML: Unsupported display type: PageBreakBox
Interactive HTML: Unsupported display type: PageBreakBox
Interactive HTML: Unsupported display type: ParallelAxisSeg
Interactive HTML: Unsupported display type: ColBox
Interactive HTML: Unsupported display type: PageBreakBox
Interactive HTML: Controls are not interactive.
Interactive HTML: Unsupported display type: ParallelAxisSeg
Interactive HTML: Unsupported display type: PageBreakBox
After reading the comment by @briancorcoran in this discussion, I suspect those messages are related.
The issue manifests the same way when I generate the files in JSL (which is my use case):
jrn << Save Journal( "report.jrn" );
jrn << Save PDF ( "report.pdf" );
I haven't scoured my PDFs closely enough to know whether other graphic elements are also missing, but nothing stands out so much as this. I see this issue on a Mac running both JMP 14 & 15; I run JMP 14 on Windows and also see it there. Any suggestions on how to get the spec limits to show up in the PDF would be appreciated.