Unexpected popup for the Form Input component

[KulikovDO]

Hello,

I would like to report a strange behavior of the matInput / Form Field component.
When I go to the page https://material.angular.io/components/form-field/examples and click on the first form field example, there is a popup with the text "1" on it. I use Google Chrome.

From my observations, it happens only for the first matInput on the page.

Kind regards,
Denis Kulikov

[Splaktar]

Please submit Angular Material and CDK questions here and issues here. This repo is for AngularJS Material.

I would have transferred this issue to the correct repository for you, but it does not follow our required issue template. This gives the team the information needed to investigate the bug or prioritize the enhancement.