Card choice layout saves wrong value to a local variable

Hello,

I have an issue with the card choice layout. Consider the following code:

a!cardChoiceField(
                  label: "What's the number of possible answers?",
                  labelPosition: "ABOVE",
                  data: {
                    a!map(
                      id: 2,
                      icon: "dice-two",
                      primaryText: "2",
                      secondaryText: "Two"
                    ),
                    a!map(
                      id: 4,
                      icon: "dice-four",
                      primaryText: "4",
                      secondaryText: "Four"
                    )
                  },
                  cardTemplate: if(
                    rule!UNI_FN_getPageWidth() = 1,
                    a!cardTemplateBarTextJustified(
                      id: fv!data.id,
                      primaryText: fv!data.primaryText,
                      secondaryText: fv!data.secondaryText,
                      icon: fv!data.icon
                    ),
                    a!cardTemplateTile(
                      id: fv!data.id,
                      primaryText: fv!data.primaryText,
                      secondaryText: fv!data.secondaryText,
                      icon: fv!data.icon
                    )
                  ),
                  value: local!numOfAnswers,
                  saveInto: {
                    a!save(
                      local!numOfAnswers,
                      save!value
                    )
                  },
                  maxSelections: 1,
                  required: true,
                  requiredMessage: local!referenceData.requiredMessage
                )

The problem I'm facing is the fact that the choice is saved into a local variable as an array with one item instead of just an Integer.

This is my default value:

And these are the values I get when I choose a card:

I know that I can just access index 1 of this variable to access the expected integer value, but I don't understand why this is happening and whether or not I can force the component to save the correct value.