Ionic 2 windows phone 10 datetime input is read only

I have following code in my view:

<ion-datetime displayFormat="YYYY-MM-DD" pickerFormat="YYYY-MM-DD" [(ngModel)]="findTripInit.dateFrom"></ion-datetime>

It is initialized in the following way in controller:

export class FindTripInit{
      public dateFrom: string;
         let currentDate: Date = new Date();
         this.dateFrom = currentDate.toISOString();

When I execute that code on my windows phone 10 field for dateFrom looks as readonly ( you can see at my screenshot ) :


but on Android app it looks like this:


does anybody knows, how to unblock windows 10 datetime and make it at least not readonly?