Ion-datetime, when pass value to 'max' date, not see monthes list till scroll

I user ion-datetime plugin.
All worked fine, till I tried to pass value to ‘max’ param.
I limit the date picker to 18 years ago.
The result is that when user open the datepicker, he see only years and days lists, if he want to select month - he need to ‘pull’ the month-list by scrolling.

Here is my code:


<ion-datetime displayFormat="MMM DD, YYYY" [(ngModel)]="user.dob" [formControl]="birthdate" monthShortNames="{{'monthes' | translate}}"


export class SignUp2Page {
  maxDob: string;
  signUpProfileForm: FormGroup;
  birthdate: AbstractControl;

constructor(public fb: FormBuilder) {  }

ngOnInit() {
  var self = this;
      'birthdate': [],

  self.maxDob =  new Date(new Date().setFullYear(new Date().getFullYear() - 18)).toISOString();


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