I do not know why it works for 90 percent of the book, and then fails on the final two uses. (In ADE it fails, in Sigil Preview, you cannot see soft page-breaks like that)
see attachments:
On the third screen-shot, there should be a page-break right after the dashed line.
I thought it might be because I nested the Headings from h3 down to h4, but it made no difference to change it to all h3. I have fiddled with the css back and forth to no avail. I am blinded from staring at semi-colons and curly brackets.
Can someone take a look at the attached epub ? (a partial only, with other xhtml files stripped out)
This is a Robert Benchley book, public domain in Life+70, don't be paranoid!
Many thanks for any input.