You should have a list of authors appearing depending what you type in the search box.
Here is the online version:
http://library.kiwix.org/gutenberg_fr_all/
@rgaudin Might be the bug impacting your work too
<div class="pure-u-1 pure-u-sm-2-5 pure-u-md-2-5">
<input type="hidden" id="language_filter" value="fr" style="display: none;">
<input type="text" name="author_filter" id="author_filter" data-l10n-id="author" placeholder="Voir les livres d'un seul auteur" class="pure-input-rounded clearable ui-autocomplete-input" autocomplete="off">
</div>
rendered html in android

I am getting this difference when viewing the html of the web page vs what gets rendered in Kiwix
edit: tch that is just the top search toolbar
The regression was introduced before 2.5.x was merged to dev. I have next to zero idea what happened back then or how the regression could have been introduced but it is present at d4d9af2975a5cbc9c23dba1f4e851bce41c7ccd0
Somewhere between 184f63a85454ef85d3e891009180083b0d2f4c0b 31/03/19 1f8d6d6ca94772b45850b34f70c2ab32e8fcf2d1 15/02/19 I will continue the hunt tomorrow
6c9794f70ff5be684b88ce34f5fe3e35a3a7df3e this is the commit, making a fix
@macgills Should we close that ticket?
Yes, currently I am working on a release branch because I don't want anything happening on develop to affect 3.0.x