multiple drop down same time multi select updating one at a time

a!localVariables(
  local!items: {
    a!map(id: 1, value: "a|b"),
    a!map(id: 6, value: "a|b"),
    a!map(id: 8, value: "a|b")
  },
  local!sortedData: {
    a!map(id: 8, value: { "a", "b" }),
    a!map(id: 2, value: { "a", "b" }),
    a!map(id: 8, value: { "a", "b" })
  },
  a!columnsLayout(
    columns: {
      a!columnLayout(
        contents: {
          a!forEach(
            local!sortedData,
            if(
              mod(fv!index, 2) <> 0,
              a!multipleDropdownField(
                label: "Item" & fv!index,
                choiceValues: { "a", "b", "c", "d" },
                choiceLabels: { "a", "b", "c", "d" },
                value: touniformstring(fv!item.value),
                saveInto: {
                  fv!item.value,
                  a!save(
                    local!sortedData,
                    append(
                      local!sortedData,
                      a!map(
                        id: count(local!sortedData) - 2,
                        value: null
                      )
                    )
                  ),
                  a!save(
                    local!sortedData,
                    todatasubset(
                      local!sortedData,
                      a!pagingInfo(
                        1,
                        - 1,
                        a!sortInfo(field: "id", ascending: true())
                      )
                    ).data,
                    
                  )
                }
              ),
              {}
            )
          )
        }
      ),
      a!columnLayout(
        contents: {
          a!forEach(
            local!sortedData,
            if(
              mod(fv!index, 2) = 0,
              a!multipleDropdownField(
                label: "Item" & fv!index,
                choiceValues: { "a", "b", "c", "d" },
                choiceLabels: { "a", "b", "c", "d" },
                value: touniformstring(fv!item.value),
                saveInto: {
                  fv!item.value,
                  a!save(
                    local!sortedData,
                    append(
                      local!sortedData,
                      a!map(
                        id: count(local!sortedData) + 1,
                        value: null
                      )
                    )
                  ),
                  a!save(
                    local!sortedData,
                    todatasubset(
                      local!sortedData,
                      a!pagingInfo(
                        1,
                        - 1,
                        a!sortInfo(field: "id", ascending: true())
                      )
                    ).data,
                    
                  )
                }
              ),
              {}
            )
          )
        }
      )
    }
  )
)

When i select multiple values at same time in multipledropdown, as its updating the local!sorteddata ,its takes only one value to process. Can we keep any hold to process all selected values at same time? or any workarounds