Ok. Back. I debugged most of the issues I was experiencing with my class, resulting from the upgrade to TexLive 2017.
I customized the way header and footers were generated, depdning on several options passed to my class. However, I realized as soon I try to add a chapter, the page that follows the chapter declaration has its headers removed and replaced by the name of the chapter.
Do you know what could be the cause of that?
According to the fancyhdr man pages, each time a chapter (or any LaTeX command dedicated to titles) is called, the \maketitle command is called and the \thispagesty…