Slides don't work on Review

DM-3dd68ceb-7dd : The file wasn't attached to your most recent reply. I'll offer a possible solution anyway:

Are you using the same variable for multiple slides? If so, that could be what's causing the problem.

A variable maintains its value until a trigger changes it. So, for example, if you change a T/F variable to True on one slide, it will remain True when the user proceeds with the course. It will only go back to False if there's a trigger to do that. 

Thus, every slide that uses a given variable may work when just that slide is previewed. But when the entire course is previewed, the variable's value may not be what's expected after the first slide that uses the variable. 

The solution is to use a unique variable for each slide. (It might also work to reset the variable to its default value when the timeline starts on any slide where it's used. However, depending on other programming, that could cause problems with revisiting.)

FYI: This is one of the issues I discussing in my troubleshooting presentation: https://training.articulate.com/webinars/ensure-smooth-sailing-in-storyline-by-following-8-pro-tips