[Framers] FM2HTML5 Split Topic by Heading Para Style not working

[Orly Zimmerman]

HI All,
I'm trying to create HTML5 directly from an FM file or book.
To start with, I would like to split the topics based on my 2 Headings.
These are numbered headings "across all columns and side heads". The page layout includes side heads. I instruct the HTML5 output to discard the numbering for all the Headings - that works. The split into Topics by Para Style is not working.
I get one long page with all info in the same HTML page.
Any ideas what could be preventing the split by heading from happening?
I'm using FM2020 v16.0.4.1062
Windows 10 Pro

Many Thanks,
Orly