Moodle 3.1.2 (Build 20160912). "More" theme.
I have a course which is using the "Show one section per page" setting.
When this is set, students (and the teacher if in Turn editing off), are not shown some resources.
When in Editing mode on, this is the content (enabling the File and "APUNTES" label doesn't make a difference):
And this is what students see:
When switching to "Show all sections on one page", that's what the students see: