Hi Themers,
I've updated Shoehorn to fix an issue: https://github.com/gjb2048/moodle-theme_shoehorn/issues/10 - which has occurred since the detachment from the parent Bootstrap theme - it happens! Please download from:
M2.8: https://moodle.org/plugins/pluginversion.php?id=8474
M2.9: https://moodle.org/plugins/pluginversion.php?id=8475
Cheers,
Gareth