Leaders disappear after exporting

[SarahPierce]

I'm having issues with leaders added in layout view not showing up when I export to a PDF. There doesn't seem to be any rhyme or reason to which ones don't fully appear. Any advice?

[NeilCurri1]

I get leader lines jumping off the page. 

[IANMACPHERSON]

i have been told by a person in IT that after adding a (simple line) leader to graphic text, that i should nudge or slightly move the selected text bx. The result is that i can position the text box closer to the leader arrow without the leader disappearing after exporting