Custom Menu for 508-compliant course not following tab order
I've built a custom menu with drop-downs. Each button along the top opens up a drop-down below it. I have built this on the first page and selected show for rest of project. it is also grouped as one object. The tab order is set how I want it to appear in the course. The tab order works correctly on the first page, but on subsequent pages things get strange. Sometimes it doesn't even tab to the Resources button at all. On other pages it goes out of order. Does anybody have any experience with this? I'm finding it very buggy and time consuming to make a 508-compliant course using Captivate. I'm using Captivate 2017 and publishing to html5 only.
This is the menu fully in the Captivate program - normally the user would only see one of the sub-menus at a time.

This is an example of the advanced actions of the menu buttons.

Resources button is supposed to be tabbed to after the conclusion sub-menu buttons as shown here:

