Ionic 2, Firebase, angular fire, inifinite list chat help?

Ionic Framework ionic-v3
1 
>     <ion-infinite-scroll 
>      position="top" 
>      (ionInfinite)="doInfinite($event)"
>      enabled="enableScrollListener">
>        <ion-infinite-scroll-content 
>        loadingSpinner="dots">
>           </ion-infinite-scroll-content>
>      </ion-infinite-scroll>


<ion-list>
  <div class="message" *ngFor="let message of conversations ; let i = index; let last = last" [ngClass]="{'message--me': uid === message.memberId, 'message--multi':(conversations)[i-1]?.memberId === message.memberId}">

    <div class="message__thumbnail">
      <img class="message__image" *ngFor="let memObsv of group.memberProfiles" src="{{ (memObsv | async)?.profilePicture.URL }}">
    </div>

    <div class="message__body">
      <div class="message__member" *ngFor="let memObsv of group.memberProfiles; let last = last">
        {{ (memObsv| async)?.firstName }}
      </div>
      <div class="message__text" *ngIf="message.message">
        {{message.message}}
        {{last ? scrollToBottomMess() : ''}}
      </div>
    </div>
  </div>
</ion-list>

.ts

doInfinite(infiniteScroll) {

    var iteration = 10;
    this.chatsProvider.changeLimit(10)
    infiniteScroll.complete()
  }

changeLimit(limit){
var newlimit = this.chatMessageLimit.getValue() + limit;
return this.chatMessageLimit.next(newlimit)
}

  ionViewWillEnter() {
    this.af__getConvoListObsv(this.group.$key, this.counter).subscribe(snap => {
      console.log(snap)
      this.conversations = snap
        this.loading.next(false)
    })
 
    this.chatsProvider.readMessagesInGroup(this.grpID, this.profileService.getUIDString(), this.enteredTutorChat)
  }


  > af__getConvoListObsv(grpID) {
>     return this.af.database.list(`/conversations/${grpID}`, {
>       query: {
>         limitToLast: this.chatMessageLimit,
>         orderByChild: 'timestamp',
>       }
>     })
>   }


  scrollToBottomMess(){
    this.content.scrollToBottom(0)
  }

Now this Kind of works however it doesn’t scroll to bottom when tested on the iphone. If I do implement the scrollToBottomMess() function, the infinite scroll keeps trying to fetch new messages. How do I get round this?