Accessibility - Section Layouts

Hi everyone,

I'm on 21.3 and noticing that Section labels aren't being read out by a screen reader despite what the documentation seems to state: https://docs.appian.com/suite/help/21.3/ux_accessibility.html#use-accessible-headers

Using NVDA on Firefox.

Here is a sample of the code. Am I missing something?

a!sectionLayout(
 label: "Section 1",
 accessibilityText: "Section 1 Accessiblity Text",
 labelHeadingTag: "H2",
 divider: "ABOVE",
 dividerColor: "ACCENT",
 contents: {
   a!sectionLayout(
     label: "Field Set 1",
     accessibilityText: "Section 2 Accessiblity Text",
     labelHeadingTag: "H3",
     divider: "ABOVE",
     contents: {
       a!columnsLayout(
         columns: {
           a!columnLayout(
             contents: a!dropdownField(
               label: "Field 1",
               placeholder: "Placeholder",
               value: index(ri!formData.FORM_DATA_SECTION1, "field1", null),
               saveInto: ri!formData.FORM_DATA_SECTION1.field1,
               required: true
             )
           ),
           a!columnLayout(
             contents: a!dropdownField(
               label: "Field 2 - Dropdown",
               placeholder: "Placeholder",
               choiceLabels: {"Choice 1", "Choice 2", "Choice 3"},
               choiceValues: {"Choice 1", "Choice 2", "Choice 3"},
               value: index(ri!formData.FORM_DATA_SECTION1, "field2", null),
               saveInto: ri!formData.FORM_DATA_SECTION1.field2,
               required: true
             )
           )
         },
         spacing: "DENSE"
       )
     }
   )
 },
 showWhen: if(isnull(ri!showWhen), true, ri!showWhen),
)

Thanks,

Mat