mat-tab-group animating on startup

[toonvanstrijp]

Bug, feature request, or proposal:

Bug

What is the expected behavior?

When the mat-tab-group renders it shouldn't start with animating the first tab content

What is the current behavior?

When the mat-tab-group renders it starts with animating the view

What are the steps to reproduce?

https://stackblitz.com/edit/angular-zwcr1a

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

Material: 6.4.1

[jrood]

This bug was introduced in 4.6.1, I would guess either by #12229 or by #12245

[angular-automatic-lock-bot]

This issue has been automatically locked due to inactivity.
Please file a new issue if you are encountering a similar or related problem.

Read more about our automatic conversation locking policy.

_{This action has been performed automatically by a bot.}