If you don't specify the injector tag, it seems that it will load the "rest" of the resources that page don't load and is however defined in config file.
For now I resolved my issue by setting an injector="" attribute :
{% stylesheets filter='less, cssrewrite' injector=""
'@AppBundle/Resources/public/less/style.less'
%}
<link href="{{ asset_url }}" type="text/css" rel="stylesheet" media="screen" />
{% endstylesheets %}