Passing data into HTML Element of Form Designer doesn't work

Hello there. I’m trying to pass data into an HTML element in Create Form Task, but so far the the placeholder for each data interpolation shows undefined. I double checked the form data and the variables are correct. I can even use them elsewhere without any errors but it’s in HTML element that the problem rises.

Here you can see the form task in action:

Here you can see the code in the HTML element:

<h5>Dear {{data.fullName}}</h5></br> The value you've selected for the pallet type and the value that the inspector inserted are not the same. Please read the values below and take the proper action:</br> <span style="font-weight: bold">Your Pallet Type: {{data.palletType}}</span></br> <span style="font-weight: bold">Inspector's Pallet Type: {{data.inspectorPalletType}} in {{data.inspectorsReportExcelFileName}}</span>