Moving steps back and forward breaks after step 2

Hello, I hope someone can help me with this, I have a guide/tour with several steps that include a "back button" and I have a "continue tour" to move forward, the back button and continue tour button work fine until I get to the 3rd step at which point the back button or continue tour buttons stop working and I get stuck on that step.

I tried using "go to step" and step number instead of previous and next steps, which didn't help.