Some of the pages in mod_feedback look a little bit broken and unstyled in Boost (and Classic) compared with how they looked in Clean.

e.g.

https://qa.moodle.net/mod/feedback/edit.php?id=18&do_show=edit

Particularly around the "Edit" menus for each item. And similar for the equivalent page when the user is completing it (though the issues there are a bit subtler).