Sebastien Vauban <wxhgmqzgwmuf@spammotel.com> writes:

> Hello,
>
> When trying to have italic text inside some paragraph that must only be
> displayed in some overlays, the text inside `/' is not converted into
> italic.

This does seem to highlight a bug in the exporter.  I cannot help you
directly with that.

However, I can suggest a more org-appropriate approach: lists understand
<1-2> type of syntax so you can change your input file to something like
the attached.  More concise and easier to read...