md-input doesn't behave correct if initially focused in md-dialog

[Mario-Eis]

Bug, feature request, or proposal:

Bug

What is the expected behavior?

What is the current behavior?

What are the steps to reproduce?

http://plnkr.co/edit/79nFR1?p=preview

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

Focused md-input should look the same on all occasions

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

4.0.3 / beta6 / at least Firefox & Chrome

Is there anything else we should know?

Placeholder is floating as soon as you type. But there will be no animation. Behaviour looks and feels a bit "out of place".

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