[iOS device] ion-textarea is not working when enter

I use maxlength=100 when to count text. But when I enter in ion-textarea maxlength showing is not true.
Code html:

  <ion-col>
      <ion-textarea  maxlength="100"  (ionChange)="inputCommentChange()" [(ngModel)]="data" rows="5" type="text" class="size20">
     </ion-textarea>
          <small class="text-note size20 note-num">{{numberCharater}}/100</small>
 </ion-col>

Code ts:

  inputCommentChange() {
    this.numberCharater = this.data.length;
  }