1675076 - [Bug] Scrolling horizontally doesnt work properly on Ff nightly

Status: NEW

(Core :: Graphics, defect)

Description

[Kevin Brosnan [Ex-Mozilla]]

From github: https://github.com/mozilla-mobile/fenix/issues/16336.

[comment]: When we scroll horizontally on a page snippet, the elements are not scrolled and disappearing. Same is not happening when the element is scrolled on top of screen. This issue is only on ff nightly. Not happening on beta and stable.

Steps to reproduce

Open m.sakshi.com
Scroll down and swipe horizontally

Expected behavior

Elements scrolling should happen normally

Actual behavior

Elements are disappearing

Device information

OnePlus 7pro

• Android device: Android 10
• Fenix version: nightly 201102 17:00

Change performed by the Move to Bugzilla add-on.

Comment 1

[Kevin Brosnan [Ex-Mozilla]]

Attachment: 97953861-c83bed00-1dc7-11eb-8ef2-93afcc3eb17c[1].gif

Comment 2

[Dzmitry Malyshau [:kvark]]

Jamie, can you repro this?

Comment 3

[Jamie Nicol [:jnicol]]

Yes. Mozregression gives bug 1659227 - https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=c36cad76a78d33eb219513bf2117c1d72c6e1d65&tochange=0a92348ed33532d65fffbfd9a8028220c2e5fc06

Hiro, can you reproduce?

Comment 4

[Hiroyuki Ikezoe (:hiro)]

Yes I could once, but not anymore. That's annoying, the case looks a simple overflow:hidden container case. There is definitely a race condition triggering the issue. Anyways the feature, partial pre-render, causing this issue hasn't yet been enabled all channels.

Comment 5

[Jamie Nicol [:jnicol]]

It seems like the horizontally-scrollable bit needs to be near the bottom of the screen to reproduce. If it is in the top 2/3rds of the screen it does not reproduce for me.

Comment 6

[Hiroyuki Ikezoe (:hiro)]

Oh yes! I can reproduce reliably. Thanks! It seems hovering position:fixed elements interferes animations? Odd.

Comment 7

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

Set release status flags based on info from the regressing bug 1659227

Comment 8

[Sai Kiran]

Hi Team,
I was the one who raised this bug on Github and then it got moved here. Would this bug be fixed?
Thank you

Comment 9

[Ryan VanderMeulen [:RyanVM]]

IIUC, this is a Nightly-only issue due to partial pre-render not being enabled past that point yet.

Comment 10

[Julien Cristau [:jcristau]]

layout.animation.prerender.partial is still nightly only.