Captivate variables causing odd Moodle behaviour

I can guess why this happens. For Captivate a user variable can have both numeric and string values, there is no direct way to define that the user variable which you inserted after the sentence is a string variable which is empty. For Captivate 0 and empty are the same. That is the reason I wrote this blog post about checking the content of a Text Entry Box:

https://blog.lilybiri.com/where-is-null-in-cp2017

Apparently Moodle sees this variable as being numeric and hence the display of 0.

Workaround? For the first sentence I would give a value : to the variable, which can never be a number.

More complicated for the second appearance, but you get the idea. Insert a real character in the variable.

Another possible workaround using the object style and can be used in this situation: edit the color of the variable and set it to the background color. Of course, that is not possible if you have something else than a solid color as background. It would have the advantage that you can use the same variable twice for this example. Avoid a break before the variable in all circumstances.