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Issue 810158 link

Starred by 6 users

Issue metadata

Status: Fixed
Owner: ----
Closed: Feb 2018
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Mac
Pri: 1
Type: Bug



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screen jumping after scrolling stops

Reported by wisbu...@gmail.com, Feb 7 2018

Issue description

UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3342.0 Safari/537.36

Example URL:
https://www.reddit.com/

Steps to reproduce the problem:
1. With Mac OSX, Canary 66.0.3342.0, use Incognito to make sure clean profile with no Extensions/Plugins.

2. Go to any page on https://www.reddit.com/

3. Scroll down with trackpad, mouse, or keyboard

What is the expected behavior?
After you stop scrolling, screen should not move.

What went wrong?
After you stop scrolling, screen will jump.

Here is a video capture. I am using the trackpad to scroll down only, then pause. Watch the scrollbar on the right. It will jump during the pause. https://streamable.com/wvhy0

This never happened before until I restarted my Mac, which updated to the latest Canary version.

There is no issue with Chrome Stable 64.0.3282.140 on the same Mac.

Does it occur on multiple sites: N/A

Is it a problem with a plugin? N/A 

Did this work before? Yes 64.0.3282.140

Does this work in other browsers? N/A

Chrome version: 66.0.3342.0  Channel: canary
OS Version: OS X 10.12.6
Flash Version: 29.0.0.96
 
Labels: Needs-Triage-M64
Labels: Needs-Bisect
Cc: sc00335...@techmahindra.com
Components: Blink>Scroll
Labels: -Pri-2 -Type-Compat -Needs-Bisect Triaged-ET M-66 FoundIn-66 Target-66 Pri-1 Type-Bug
Status: Untriaged (was: Unconfirmed)
Able to reprodcue this issue on reported version 66.0.3342.0 canary Using Mac 10.13.1 and Mac 10.12.6 Mac book Pro Retina. i.e; Page jumps on scrolling Reddit.com

Observations: 
1. Issue is not seen in 66.0.3342.0 canary using Mac book Air(both 10.12.6 and 10.13.3)
2. Issue is not seen in equivalent dev(i.e; 66.0.3342.0 dev)
3. Issue is not seen in Linux and Windows

As issue is not seen in equivalent dev,it will not be possible for TE to provide bisect. Hence removing Needs-Bisect label and marking as Untriaged.

Could someone from Blink>Scroll team to have a look at this issue.

Thanks!

Comment 4 by thex...@gmail.com, Feb 8 2018

This started happening for me today too. I'm on 65.0.3325.51 dev, Windows 10 17083.

Comment 5 by thex...@gmail.com, Feb 8 2018

Just to add some info, I have disabled 4 scroll related flags and the issue seems to be solved. Don't know which one specifically triggers the bug, but that should help triaging.

#enable-wheel-scroll-latching
#enable-scroll-anchor-serialization
#enable-scroll-anchoring
#overscroll-history-navigation
Cc: skobes@chromium.org
Labels: Needs-Feedback
If it is happening with keyboard as well that will rule out latching and point to anchoring.

Are you able to try it with just the scroll-anchoring off?

Comment 8 by jjwi...@gmail.com, Feb 8 2018

I was having this same problem on Version 65.0.3325.51 (Official Build) dev (64-bit) Windows 10

It looks like disabling just #enable-scroll-anchoring may have fixed it for me

Comment 9 by wisbu...@gmail.com, Feb 9 2018

Update: On MacOS 10.12.6 Sierra, I tried changing the value of #enable-scroll-anchoring from Default to Enabled. Then restarted Chrome (which then also auto-updated to 66.0.3343.0 #535276). The bug disappeared.

Then I fiddled around with the #enable-scroll-anchoring values, trying Disabled, Enabled, Default (with restarts). I could not reproduce the bug with any setting.

Then I downgraded back to Canary 66.0.3342.0 #534887 again (I had saved a copy of the .dmg installer). I still could not reproduce the bug with any setting of #enable-scroll-anchoring. 

So either upgrading Chrome or toggling the #enable-scroll-anchoring value seems to permanently fix the bug.

Can someone who currently has the bug upgrade their Chrome (without touching the #enable-scroll-anchoring flag) to see if that fixes it? If not, then try toggling #enable-scroll-anchoring flags.

Comment 10 by bokan@chromium.org, Feb 15 2018

Cc: pnoland@chromium.org
wisbucky@, is it still fixed in more recent canaries? In particular, I'd make sure to try toggling #enable-scroll-anchor-serialization as that's new and under development.
wisbucky@ what do you want us to do with this issue? Something might have also been adjusted on the reddit.com side. If we can't repro it is hard to fix :-)

Comment 12 by wisbu...@gmail.com, Feb 26 2018

I think this can be closed. I was not able to reproduce with later versions of Canary.
Status: Fixed (was: Untriaged)

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