Using {placeholders} in Thank You Page

Hey there, I built a form using the "Form Calculation" widget, hiding it from the user. The calculation works perfectly (I can tell because I tested it before hiding it). I named the field "theScore" (unique name, see screenshot) and I'm using it to calculate a score based on the users answers.

Unfortunately I can't use this field on the Thank You page. The FAQs and guides are out-dated, because there is no WYSIWYG editor anymore and using "{theScore}" within the Thank You page's editor leads to an empty string, e.g.

"Your score is {theScore}." is displayed as "Your score is ."

Can anyone help?

Here is the article to edit thank you page for the card layout. How-to-Edit-Thank-You-Page-Settings 

You can also use the field's unique name to populate the data from the form. I checked your Thank you page settings nothing appears to be wrong there. 

I also cloned it and try to submit which works fine. 

Can I make a test submission on your form to check this?

 Hi Ashton, thanks for your quick reply! Please go ahead, this is just a test form.

I tested your form and this message was shown.

21 is the score {theScore}.

You have the following 3 conditions. 

Where you able to resolve the issue?