Inverted cdk-virtual-scroll-viewport items order when they have the matTooltip directive

[alvaromartmart]

Reproduction

Use StackBlitz to reproduce your issue: https://stackblitz.com/edit/components-issue-trmeqm

Steps to reproduce:

1. Add matTooltip directive to a div inside a cdk-virtual-scroll-viewport container

Expected Behavior

Items should be displayed in the original order.

Actual Behavior

The order of the items is inverted.

Environment

• Angular: 7.0.6
• CDK/Material: 7.1.0
• Browser(s): Google Chrome
• Operating System (e.g. Windows, macOS, Ubuntu): Ubuntu

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