IONIC 3 - <ion-segment> <div> Google Map not showing - css

Question

I am experiencing a problem showing a map in my page.
This is my code:
<ion-header>
<ion-navbar>
<button ion-button menuToggle>
<ion-icon name="menu"></ion-icon>
</button>
<ion-title>
Cerca
</ion-title>
</ion-navbar>
<ion-toolbar>
<ion-segment [(ngModel)]="mySegment">
<ion-segment-button value="Mapa">
Mapa
</ion-segment-button>
<ion-segment-button value="Lista">
Lista
</ion-segment-button>
</ion-segment>
</ion-toolbar>
</ion-header>
<ion-content padding>
<div [ngSwitch]="mySegment">
<div #map id="map" style="height:100%;" *ngSwitchCase="'Mapa'" (click)="openBestofferdetailPage(offer)">
</div>
<div *ngSwitchCase="'Lista'">
<button ion-item *ngFor="let offer of offersmodelArray" (click)="openBestofferdetailPage(offer)">
<ion-thumbnail item-left>
<img src="{{offer.imageoffer}}">
</ion-thumbnail>
<p style="font-size:50%;">
<ion-row>
<ion-col>
<span item-left>{{offer.cityprovider}}</span>
<span item-left>({{offer.distanceToProvider}} km)</span>
</ion-col>
<ion-col right text-right>
<s>
<span item-right>{{offer.oldprice}}</span>
</s>
</ion-col>
</ion-row>
<ion-row>
<ion-col>
<span item-left>{{offer.sold}}</span>
<span item-left>comprados</span>
</ion-col>
<ion-col right text-right>
<b><p style="font-size:70%;" style="color:green">
<span item-right>{{offer.newprice}}</span>
</p></b>
</ion-col>
</ion-row>
</p>
</button>
</div>
</div>
</ion-content>
The default option is "Mapa" however it doesn't show the map, I guess is an issue related to the position setup and the <ion-segment> but I would appreciate your help on understanding where I can make the change.
Just as a complementary information if I set the map outside the content the map is being showed without any problem
<ion-content padding>
<div #map id="map" style="height:100%;"></div>
</ion-content>
I saw some related question but without answer
Ionic 2, use google maps in ion-segments
Please your help