I have the same problem, even worse with a delay of 25 seconds between program start and dock update.
This is a fresh install of 20.04 LTS on a clean laptop with a wiped hard disk. schorsch@jbook:~$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 20.04 LTS Release: 20.04 Codename: focal schorsch@jbook:~$ uname -a Linux jbook 5.4.0-29-generic #33-Ubuntu SMP Wed Apr 29 14:32:27 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux The only thing I did after the new installation was installing the dash- to-panel Gnome extension. Once, I deactivated that extension and the Ubuntu Dock showed again, I noticed the delay. However, I cannot say for sure if the delay has been there from the beginning. I completely removed the dash-to-panel extension using apt, but the Ubuntu Dock delay is still there. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell-extension-ubuntu-dock in Ubuntu. https://bugs.launchpad.net/bugs/1869572 Title: Dock icons are shown very slow Status in gnome-shell-extension-ubuntu-dock package in Ubuntu: Incomplete Bug description: When I open a new app (e.g a terminal window) in the dock does not appear nothing for about 15 seconds, when the icon of the terminal appears. It is incredibly annoying since I work open and closing apps and don't know where they are since the dock is updated every 15 seconds ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: ubuntu-release-upgrader-core 1:20.04.16 ProcVersionSignature: Ubuntu 5.4.0-20.24-generic 5.4.27 Uname: Linux 5.4.0-20-generic x86_64 ApportVersion: 2.20.11-0ubuntu21 Architecture: amd64 CrashDB: ubuntu CurrentDesktop: ubuntu:GNOME Date: Sun Mar 29 13:19:25 2020 InstallationDate: Installed on 2020-02-20 (37 days ago) InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017) PackageArchitecture: all SourcePackage: ubuntu-release-upgrader Symptom: dist-upgrade UpgradeStatus: No upgrade log present (probably fresh install) VarLogDistupgradeTermlog: mtime.conffile..etc.update-manager.release-upgrades: 2020-03-25T18:04:30.897651 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell-extension-ubuntu-dock/+bug/1869572/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp