I never use "border-bottom" or "break-before: avoid;". The only edits I do after docx import to epub on Calibre (extra Save As in LO Writer) are in the image CSS classes.
I think the only 100% reliable thing to do with page breaks compatible with everything is having a new HTML file to force a pagebreak. The docx conversion to epub by calibre automatically creates a new HTML file at each original page break in LO Writer (only done in heading/paragraph styles).
Also I've not bothered with Kindle Previewer for years. It's unreliable compared to real Kindles (I've kept 3 models, but 2 would do).
|