Mousedown not fired on iOS

So I don’t know if it’s a Ionic beta 11 or WkWebView problem.

On my iPhone 4 (real device), event mousedown on a button is not fired.

Tried the same while debugging in chrome or on my real android device, everything was fine, event mousedown was fired.

Anyone could or had the problem?

<ion-grid>
<ion-row padding-top>
    <ion-col width-50 text-center>
        <button (mousedown)="pickShare()" (click)="share()">test</button>
    </ion-col>
</ion-row>