Alert: setCssClass doesn't work after alert.present()

[ionitron-bot]

Short description of the problem:

When setCssClass on an alert element after alert.present() class is not added

What behavior are you expecting?

Specified class added to element

Code

This works:

let alert = this.alertCtrl.create({
    title: "Title",
    message: "Message",
    buttons: ["OK"]
});
alert.setCssClass("alert-wide");
alert.present();

This doesn't work:

let alert = this.alertCtrl.create({
    title: "Title",
    message: "Message",
    buttons: ["OK"]
});
alert.present();
alert.setCssClass("alert-wide");

This doesn't work too, but instead alert.setMessage works also after present:

let alert = this.alertCtrl.create({
    title: "Title",
    message: "Message",
    buttons: [{
        text: "OK",
        handler: () => {
            alert.dismiss();
        }
    }, {
        text: "Details",
        handler: () => {
            alert.setCssClass("alert-wide");
            alert.setMessage("NewMessage");
            return false;
        }
    }]
});
alert.present();

Which Ionic Version?
2.x

Run ionic info from terminal/cmd prompt: (paste output below)

Cordova CLI: 6.3.1
Ionic Framework Version: 2.0.0-rc.0
Ionic CLI Version: 2.1.0
Ionic App Lib Version: 2.1.0-beta.1
OS: Windows 8.1
Node Version: v6.7.0

[Ouael-Ben]

Still this bug no solution right now