[Bug 1918874] Re: [regression] Application windows appear over the icon grid when Ubuntu Dock or Dash To Dock is loaded

[Daniel van Vugt]

Carrying the input thread code is a risk to 21.04 because it's 45000
lines of patches. It's caused a few regressions so far and is likely to
be a maintenance problem when backporting fixes to 21.04 between now and
January 2022 (when 21.04 reaches EOL). We're kind of managing at the
moment but I am not totally confident it won't continue to be the source
of more problems this year.

Also, while we spend days and weeks fixing these regressions in the
input thread backport to 3.38, that's time we don't get to spend on
GNOME 40/41 for Ubuntu 21.10 and 22.04.

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Title:
  [regression] Application windows appear over the icon grid when Ubuntu
  Dock or Dash To Dock is loaded

Status in mutter package in Ubuntu:
  In Progress

Bug description:
  Click on 'Show Applications' the icons of the applications appear but the windows of the applications does not disappear so the icons are hidden.
  problem happens with both sessions Xorg and Wayland after last updates
  see attached picture

  ProblemType: Bug
  DistroRelease: Ubuntu 21.04
  Package: nautilus 1:3.38.2-1ubuntu1
  ProcVersionSignature: Ubuntu 5.10.0-14.15-generic 5.10.11
  Uname: Linux 5.10.0-14-generic x86_64
  ApportVersion: 2.20.11-0ubuntu60
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Mar 12 07:36:41 2021
  GsettingsChanges:
   b'org.gnome.nautilus.window-state' b'initial-size' b'(1288, 663)'
   b'org.gnome.nautilus.list-view' b'default-column-order' b"['name', 'size', 'type', 'owner', 'group', 'permissions', 'where', 'date_modified', 'date_modified_with_time', 'date_accessed', 'recency', 'starred', 'detailed_type']"
  InstallationDate: Installed on 2021-02-28 (11 days ago)
  InstallationMedia: Ubuntu 21.04 "Hirsute Hippo" - Alpha amd64 (20210228)
  SourcePackage: nautilus
  UpgradeStatus: No upgrade log present (probably fresh install)
  usr_lib_nautilus:
   evince                            3.39.2-1
   file-roller                       3.38.0-1
   nautilus-extension-gnome-terminal 3.38.1-1ubuntu1
   nautilus-share                    0.7.3-2ubuntu3

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