Next-button on base slide isn't updated after viewing lightbox slides
I would like some ideas on how to solve the following issue. On the below slide are some icons. When the timeline starts, the next-button is disabled. The user has to click on all items before he can advance, and the next-button is set to normal.
When an icon is clicked, a lightbox slide opens:
When the lightbox is closed, the icon shows a checkbox via a different state ('Visited'). I created a unique variable for each icon, which starts as False, and is set to True when the icon is clicked.
When all icons are visited, the next-button should become clickable, with state Normal. However, this isn't working, because the base layer doesn't get updated. The next-button remains Disabled:
It is only when I go back to another slide, and revisit this slide, that the next-button changes to it's Normal state.
I need lightbox slides instead of layers to be shown when an icon is clicked, because I have layers inside those lightbox slides. And layers within layers don't exist.
Any ideas how to solve this, and make sure the base layer gets refreshed so the next-button is updated to its normal state? Thanks in advance!