1646361 - scroll position changes on keydown inside input element inside container with perspective set

Status: RESOLVED DUPLICATE of bug 1642603

(Core :: Layout, defect)

Description

[Sean McMillan]

Attachment: parallax-edit-firefox.html

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:77.0) Gecko/20100101 Firefox/77.0

Steps to reproduce:

I have a form inside a parallax scrolling container using perspective: 1px and transform-style: preserve-3d. When I type text (actually any keydown) into the input element, the container scrolls back to the top.

I am baffled as to why this happens. It doesn't behave this way in Safari or Chrome.

I've made a miniature test case that reproduces the issue. (attached)

To see it, scroll down to the input element, focus it, and begin typing. The container scrolls to the top.

Actual results:

My container scrolls to the top.

Expected results:

The scroll position should not change.

Comment 1

[Alice0775 White]

This seems to be duplication of Bug 1642603

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

The severity field is not set for this bug.
:alaskanemily, could you have a look please?

For more information, please visit auto_nag documentation.

Comment 3

[Emily McDonough [:alaskanemily]]

This appears to have been duplicated by bug 1642603 and I cannot confirm it still occurs.