We can't track bugs in Chrome here because Chrome is not part of Ubuntu.
However Chromium is so I will assume the same bug exists there.

** Summary changed:

- Scrolling jumps after switching tabs
+ Scrolling jumps after switching windows

** Package changed: xorg (Ubuntu) => chromium-browser (Ubuntu)

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Touch seeded packages, which is subscribed to xorg in Ubuntu.

  Scrolling jumps after switching windows

Status in chromium-browser package in Ubuntu:

Bug description:
  The bug has to do with mouse scrolling and switching windows; I do not
  know which package it is part of.

  The problem arises when I have two windows of two different
  applications open, such as Google Chrome and a text editor. To
  reproduce the error, I have Google Chrome open initially, then I
  switch tabs (using the shortcut Alt-Tab) to the text editor, then
  scroll around on the text editor. When I Alt-Tab back to Google
  Chrome, my first scroll leads to the page jumping by a large amount
  either up or down before resuming regular mouse scrolling. It is only
  this initial scroll after switching tabs that jumps like this. It also
  happens regardless of whether I use a mouse or the touch pad.

  I also notice, given the same scenario, if I scroll up on the text
  editor, the Google Chrome initial scroll jump will be upward. If I
  scroll down on the text editor, the Chrome jump will be downward. If I
  scroll a lot in the text editor, the Chrome jump will be large. If I
  scroll a small amount in the text editor, the Chrome jump will be

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: xorg 1:7.7+19ubuntu7.1
  ProcVersionSignature: Ubuntu 5.3.0-40.32~18.04.1-generic 5.3.18
  Uname: Linux 5.3.0-40-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.11
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
  CompositorRunning: None
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Mar 20 17:17:39 2020
  DistUpgraded: Fresh install
  DistroCodename: bionic
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes, if not too technical
   Intel Corporation UHD Graphics 620 [8086:5917] (rev 07) (prog-if 00 [VGA 
     Subsystem: Hewlett-Packard Company UHD Graphics 620 [103c:83b9]
  InstallationDate: Installed on 2020-01-26 (54 days ago)
  InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 8087:0a2b Intel Corp. 
   Bus 001 Device 002: ID 04f2:b593 Chicony Electronics Co., Ltd 
   Bus 001 Device 004: ID 046d:c52b Logitech, Inc. Unifying Receiver
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: HP HP Spectre x360 Convertible 13-ae0xx
   PATH=(custom, no user)
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.3.0-40-generic 
root=UUID=7cfa547e-7b38-4467-9a1c-5f581ce738c1 ro quiet splash vt.handoff=1
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/07/2019
  dmi.bios.vendor: AMI
  dmi.bios.version: F.24
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: 83B9
  dmi.board.vendor: HP
  dmi.board.version: 56.43
  dmi.chassis.type: 31
  dmi.chassis.vendor: HP
  dmi.chassis.version: Chassis Version
  dmi.product.family: 103C_5335KV HP Spectre
  dmi.product.name: HP Spectre x360 Convertible 13-ae0xx
  dmi.product.sku: 1WU65AV
  dmi.sys.vendor: HP
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.99-1ubuntu1~18.04.2
  version.libgl1-mesa-dri: libgl1-mesa-dri 19.2.8-0ubuntu0~18.04.3
  version.libgl1-mesa-glx: libgl1-mesa-glx 19.2.8-0ubuntu0~18.04.3
  version.xserver-xorg-core: xserver-xorg-core N/A
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
  version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A

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