Reactive forms within a tab

[Swoox]

Bug, feature request, or proposal:

Bug

What is the expected behavior?

The animationDone will be fired when the tab is done with switching.

What is the current behavior?

When hit enter I switch to the next tab. On the next tab it select the first form of my reactive form category (from the form array). If the from field has a dropdown panel, the panel shown on a different position.
I tried to fix this with "animationDone". This seems to be triggered before the selectedTabChange, where I set the index. So I can never switch to my other category (array).

I now fixed it with with a timeout of 200 ms. But this is not a wanted behaviour.

What are the steps to reproduce?

https://angular-zb8nct.stackblitz.io

private tabChanged(_index: any) {
  this.selectedTab = _index;
  // do something to focus the form field with a dropdown or autocomplete.
  document.getElementById(this.form.controls['array']['controls'][_index]['controls']['array']['controls'][0]['controls']['fieldID']['value']).focus();
}

What is the use-case or motivation for changing an existing behavior?

I would like the animationDone to be triggered when the animation is really done. And I would like it to be triggered after the selectedTabChange

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

"@angular/material": "^5.1.1"
"@angular/core": "^5.0.5"
"typescript": "~2.4.2"

Is there anything else we should know?

[tinayuangao]

@Swoox Could you please provide a StackBlitz reproduction?

starter: https://goo.gl/wwnhMV

[Swoox]

I made a reproduction you can see the behaviour but not sure why the dropdown not align under the matinput..
https://angular-zb8nct.stackblitz.io/

[Swoox]

Hmm upgraded materials to the latest version and works now cheers :)

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