Since 1.7.61, Blocksy has a proper integration in menus with the Page scroll to id plugin. To get it to work correctly, you need to make sure to apply the .ct-highlight class to the highlighted menu item. To do this, please follow these steps:

1. Go to Settings -> Page scroll to id
2. Scroll to the Classes & highlight options option
3. Replace the mPS2id-highlight class with ct-highlight

As a result you will have proper items highlighting when scrolled to that section.