SAK-31465 introduced interesting functionality to allow the left hand side menu to slide so that it is visible while a user is working with content that goes off the screen. This seems like it could be helpful on mobile devices but it caused dizziness in QA testers working with Samigo Test & Quizzes and questions about Accessibility came up as well.
For these reasons it is being disabled in the 11.3 maintenance release and needs a review in 12. Also this may need a property to allow institutions to selectively turn it off. (Property added in