How to solve accentuation problem in Ionic

Guys, I went to pass a data through the routes in Ionic, Angular, only the data is a string with accent, when I put the variable that receives the value to show in the title it shows good, however, when I enter another page and return it converts the letter with accent to UTF - 8 (by the research I performed). In addition, I tried with the reverse decode, but whenever it comes in and back it converts again.

ngOnInit() {
    this.inscricao = this.route.params.subscribe(param => {
      this.tituloPesquisa = param['titulo']
    });
    this.listaProdutos = this.gSacola.getProdutos();
  }

<ion-header>
  <ion-toolbar>
    <ion-buttons slot="start">
      <ion-back-button defaultHref="/"></ion-back-button>
    </ion-buttons>
    <ion-title>{{ tituloPesquisa }}</ion-title>
  </ion-toolbar>
</ion-header>