TOC not showing in published video (Captivate 2017)

I have created a number of projects in Captivate 2017, I have set up a TOC for each of these projects and ensured that show TOC is checked and that I have refreshed the TOC so it is completely up to date.  when I preview the projects the TOC is there, however, when I publish the projects as a video the TOC it is not there.  This is happening in every single project that I have published.  I have previously used Captivate 6 and Captivate 8 and never had these problems.  Has anyone else experienced this problem as I am at a complete loss as to why this isn't working.  I've gone through this with a colleague who uses captivate as well and even they are stumped by this one!  Any help would be greatly appreciated.