The single slide .story attached has an input box, slider, variable "score" that ties the two together.
The variable score is shown on-screen.
Entering values greater than zero works great. Adjusting the slider works great
Enter zero in the text box and it breaks. The variable slider is frozen at the prior value, the slider doesn't update the text box, however entering a numeric value will move the slider although the display of %score% is frozen.