Conditional next button

Hi Tom.  I've had a love-hate relationship with the Disable state for quite a long time, and it started because I was experiencing issues similar to the ones you've highlighted here when employing it.  In the place of the built-in Disable state, I choose to either create a custom Disable state or utilize the built-in Visited state in combination with a transparent shape that I place over the visited object to act as a "Cover," effectively "disabling" it.  To troubleshoot the problems seen in your project file, I've taken this latter approach, reworking existing triggers and adding quite a few new ones to ensure state changes occur as expected.

If you would like to talk through the process in more detail, I'd be happy to schedule some time to do that.

- Daniel