readthedocs latest ARM has two "9.17.18" Release Note sections
https://bind9.readthedocs.io/_/downloads/en/v9_17_18/pdf/
and
https://bind9.readthedocs.io/_/downloads/en/latest/pdf/
are not the same document, the "latest" version has two 9.17.18 Release Note sections.
The same is the case for the html versions.