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In web, create a forum in an empty section. Create at least 1 discussion.
In the app in tablet mode, enter the course and enable download sections using the top right menu.
Download the section where the new forum is. When the download finishes, check that no icon is shown next to the section.
In web, add a new reply or discussion in the forum.
In the app, perform a Pull To Refresh in the section where the forum is (not in the list of sections). Check that the forum now has a refresh button and that the section has the refresh button too.