Bug: StrictDoc/HTML2PDF: 3 pages instead of 5

[stanislaw]

Describe the bug

There is a timing issue in the HTML2PDF when sometimes the pages are not printed correctly. Most of the content gets glued to the table of contents when normally TOC is a separate page. Also, the front page is missing.

  File "/Users/Stanislaw/workspace/projects/strictdoc-project/strictdoc/tests/integration/features/html2pdf/05_generate_bundle_document/test_pdf.py", line 5, in <module>
    assert len(reader.pages) == 5, reader.pages
AssertionError: [PageObject(0), PageObject(1), PageObject(2)]

To Reproduce

run_times 100 exit_first invoke ti --html2pdf --focus 05_generate_bundle_document

Expected behavior

With the integration test above, the result must always be 5 pages, not sometimes 3.

Screenshots

Broken PDF example: bundle.pdf

Environment

Reproduces occasionally on both macOS locally and Linux GitHub Actions.