ChangeDetectionStrategy.OnPush causes tooltips to break after upgrade to beta 3

[alexjlockwood]

Bug, feature request, or proposal:

Tooltips started looking glitchy after I upgraded to beta 3 (see the gif and plunkr below).

It seems like the glitch has to do with setting changeDetection: ChangeDetectionStrategy.OnPush on the component, because when I remove that line the tooltips look fine.

What is the expected behavior?

The tooltip shouldn't flicker.

What is the current behavior?

The tooltip flickers:

What are the steps to reproduce?

Here is a Plunkr that reproduces the issue: https://plnkr.co/edit/uqE0gm?p=preview

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

I am using Chrome, the latest version of Material (beta 3), and the latest version of Angular (4.0.1).

[willshowell]

Looks like dupe of #3497, with PR on the way #3671

[jelbourn]

Yep, should be fixed by #3671 in the next release.

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