I have a custom entity called "Test".
On the Test form we use the navigation tool, in order to jump from one section to the next:
(Note some text has been removed from the image for privacy purposes)
My problem is, upon load of the Test Form I then click the navigation button and select a section from the drop down....the form automatically takes the user to the selected section...however, after this first selection the navigation tool seems to disappear completely from the header....you cannot view or use the drop down again...
Note: there are no header issues in the form editor.