So I've had this issue now for over five years and still nothing has been fixed despite me sinking thousands of pounds in subscription fees to this steaming pile of an app. We do lots of presentations that have other indesign files as links and we are constantly getting crashes when we export to pdf - I've been on with adobe with this and they insist it's corrupt files that cause this, yet when I proved to them that it wasn't they just stopped replying to them - great customer service. The crash can simply happen when adding or deleting pages then exporting, plus you can usually pdf things in two halves, proving that it's not corrupt files causing it. I've even packaged the exact same files to adobe, one with added pages, one with out and... silence.