Timeline trigger with conditions not activating

I have a pseudo quiz and feedback section in my project as follows:

1. Users are presented with five persona cards to click on the Main slide.
2. When they click a persona card, it branches to another slide.
3. Each Persona slide contain more info plus a set of radio buttons to choose from. They choose one and click Submit.
4. A feedback layer shows (on the Persona slide) describing info related to their choice. They click Continue and are returned to the Main slide. A variable indicating this persona has been visited is changed to True.
5. On the Main slide, a layer shows for the Persona just visited to indicate it has been viewed.
6. The user can select another Person to view and we repeat steps 2-6.
7. When all Personas have been viewed, a Continue button should appear which, when clicked will branch to a recap slide.

My issue is that the Continue button never displays.

I have a trigger hiding the button when the timeline starts on its timeline. Another trigger changes it to Normal when the slide timeline starts if all the personas visited variables are True.

If I change the trigger and set it to Normal on the button timeline (instead of the slide), the project shows a buffering three dots progress bar thing and freezes.

There are a few triggers on the timeline jumping forward to manipulate animations on the Persona cards, but nothing impending the timeline from finishing. I don't want to change these.

I've tried various methods of setting the button to Normal related to timelines or time reached, but can't get it to display. Attached is a simplified version of the project with only 2 personas and just the basic functionality.

If anyone can help make this work, I would greatly appreciate it.