RefreshVariable is not working

Hi, i´m facing a refreshvariable problem, this code call a rule caled rule!slc_obtenerPolizas(idSiniestro: ri!siniestro.idSiniestro)

  local!refrescarPolizas: false,
  /*REGLA QUE OBTIENE LAS POLIZAS*/
  /*Y COBERTURAS*/
  local!polizas: a!refreshVariable(
    value: rule!SLC_obtenerPolizas(idSiniestro: ri!siniestro.idSiniestro),
    refreshOnVarChange: local!refrescarPolizas
  ),

rule expression is this:

a!localVariables(
  local!polizas: rule!SLC_GetObtenerPolizasByDeclaracionID(idSolicitud: ri!idSiniestro).data,
  local!ramos: a!forEach(
    items: local!polizas,
    expression: a!update(
      fv!item,
      "ramos",
      rule!SLC_GetObtenerCoberturaByPolizaID(idPoliza: fv!item.idSiniestroPoliza).data
    )
  ),
  local!ramos
)

which call a two api, we cast json into CDT. 

a!localVariables(
  /* 1. First, configure the integration object to return successfully */
  local!integrationResponse: a!refreshVariable(
    value: rule!CT_SLC_getCoberturaConsultarxPolizaID(
      idPoliza: ri!idPoliza,
      usuario: loggedInUser()
    ),
    refreshAlways: true
  ),

Even local!refrescarPolizas is changing value by button, my rule rule!SLC_obtenerPolizas is not refreshing.

I tried using unconvetional code like:

  local!polizas: if(
    local!refrescarPolizas,
    rule!SLC_obtenerPolizas(idSiniestro: ri!siniestro.idSiniestro),
    rule!SLC_obtenerPolizas(idSiniestro: ri!siniestro.idSiniestro)
  ),

and it works, however i wanna know why my refreshvariable is not working. Thanks in advance for your reply