Hi Gareth, We really love this plugin and have started using it on many of our courses.
We're testing an upgrade to Moodle 3.9 and I noticed that the footer appears about at the bottom of 1 screenful rather than at the bottom of the course. The only occurs with courses using Collapsed Topics format. We are running plugin version 18.104.22.168 on Moodle 3.9 using a variant of Boost 2020061500. This occurs on Chrome 83, but not on Firefox 78.
Do you have a recommended fix for this problem? Or do you have an estimate of when you'll be testing this plugin for 3.9 compatibility?