I was helping a Teacher with her course and noticed her main course page took a very long time to load which worried me. I tested some other courses and they all loaded fast. The problem seems to be with just this course. I changed the theme to Boost and the course loaded in 2.22 seconds, with Adaptable it takes over 20 seconds.
I migrated all her Activities and Resources to a new course and it loaded fast with Adaptable. Unfortunately students have completed activities and when I backed up and restored with User data and logs the slow page load was reproduced.
I've no idea how to begin investigating and resolving this. Please advise.
Moodle 3.9, Adaptable 184.108.40.206