Refresh readonly grid data on button click not working

a!localVariables(
  local!currentUser: rule!CORE_GetLoggedInUserName(),
  local!refreshCounter: 0,
  local!employees: a!refreshVariable(
    value: rule!PM_GetCurrentAddresses(
      tenantId: "77b50320-5f06-5740-84f4-18d4a8cda51d",
      identifierId: local!currentUser,
      serviceLocationId: "cac14c53-a058-4824-86dc-f24cea29b948"
    ),
    refreshOnVarChange: local!refreshCounter
  ),
  {
    a!buttonArrayLayout(
      buttons: {
        a!buttonWidget(
          label: "Refresh",
          size: "SMALL",
          style: "SECONDARY",
          saveInto: a!save(local!refreshCounter, local!refreshCounter + 1)
        )
      }
    ),
    a!gridField(
      labelPosition: "COLLAPSED",
      data: local!employees,
      refreshOnVarChange: local!refreshCounter,
      columns: {
        a!gridColumn(
          label: "Address Type",
          value: fv!row.addressTypeDescription,
          width: "MEDIUM"
        ),
        a!gridColumn(
          label: "Address Line 1",
          value: fv!row.line1,
          width: "MEDIUM"
        ),
        a!gridColumn(
          label: "City",
          value: fv!row.city,
          width: "MEDIUM"
        ),
        a!gridColumn(
          label: "State",
          value: fv!row.stateDescription,
          width: "MEDIUM"
        ),
        a!gridColumn(
          label: "Postal Code",
          value: rule!CORE_FormatZipCode(fv!row.zip)
        ),
        a!gridColumn(
          label: "Effective Date",
          value: rule!PM_FormatDate(fv!row.effectiveDate)
        ),
        a!gridColumn(
          label: "End Date",
          value: rule!PM_FormatDate(fv!row.endDate)
        )
      }
    )
  }
)

Instead of changing the counter, why don't you just query the data again and save it in the variable? That will be much easier. Also, make sure that your rule - PM_GetCurrentAddresses, doesn't have a refresh variable configuration. If it has, then set it to refreshAlways: true. 

Instead of changing the counter, why don't you just query the data again and save it in the variable? That will be much easier. Also, make sure that your rule - PM_GetCurrentAddresses, doesn't have a refresh variable configuration. If it has, then set it to refreshAlways: true.