backdropOpacity invalid

[MuNitCat]

When I open a ConfirmModal once and then close it, the backdropOpacity of ModelSetting appears to be 0 when I subsequently open ModelSetting.

const modalConfig = {
  ConfirmModal: {
    modal: ConfirmModal,
    backdropOpacity: 0,
  },
  ModelSetting: {
     backdropOpacity: 0.4, 
    modal: ModelSet,
  },
}

const modalStack = createModalStack(modalConfig);

export default modalStack;