Why is my data not updating when changed in my wordpress api?

I am using a temporary free hosted website where i am updating/adding new articles. This is the feed that is generated by the wordpress api:
https://feederhorgasz.000webhostapp.com/wp-json/acf/v3/posts?_embed?

I can clearly see that if i rewrite a title it is updating in this feed, but my application is still showing old data even if i rebuild my app.

Anyone know why is this happening?

 url: string = 'https://feederhorgasz.000webhostapp.com/wp-json/acf/v3/posts?_embed?'; 
  items:any;
   hirfolyambetolt(){
    return new Promise((resolve) => {
    this.http.get( this.url ) 
    .map(res => res.json()) 
    .subscribe(data => 
        {  
          this.items = data;
          
         
         
        }); 
        
        resolve(true);
      });
      
   }

This code is running in ionviewwillenter

html:

<ion-card ion-item *ngFor="let item of items" (click)="itemKlikk(item)">
    <ion-card-content>
      <ion-item>
        <h2>{{item.acf.cim}}</h2>
        <p>{{item.acf.datum}}</p>
      </ion-item>

      <img src="{{item.acf.image}}"/>

      <ion-card-content>

        <div class="text" [innerHTML]="item.acf.short"></div>
      </ion-card-content>

You can following this below link


Good Luck
Thanks