Boost Theme - Navigation overlaps combo box

Have a course with course format "Topics" and "Show one section per page".

When Navigating through the activities in the section the text overlaps/underlaps the Navigation Combo Box "Jump to..."

This Issue is for  Moodle 3.5.3+ (Build: 20190111), (see Attachment 1 "20190111.png"))

In Moodle 3.5.1 (Build: 20180709) it Works (see Attachment 2 "20180709.png"))