What version of FM are you running? There’s a bug in the FM2015 3.1 patch that’s being worked on to fix TOC issues.
Are you all patched up? Is what you’re seeing happening with all books or just one?
I don’t remember how to check this.
Help > About FrameMaker gives you the version
Help > Updates to update to the current patch
Thanks. Looks like I need my admin to install these updates. I have them downloaded.