I think this is a combination of bug 1769383, and some other hover/resize bug that is also mentioned in bug 1812996 and bug 1812998.
So let's make this about just the hover/resize bug. ** This bug is no longer a duplicate of bug 1769383 Ubuntu dock/launcher is shown on the lock screen -- 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/1812407 Title: Dock resize on hover and on window focus Status in gnome-shell-extension-ubuntu-dock package in Ubuntu: Confirmed Bug description: Dock resize on hover and on window focus. Description: Ubuntu 18.04.1 LTS Release: 18.04 gnome-shell-extension-ubuntu-dock: Installed: 0.9.1ubuntu18.04.1 Candidate: 0.9.1ubuntu18.04.1 ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: gnome-shell-extension-ubuntu-dock 0.9.1ubuntu18.04.1 ProcVersionSignature: Ubuntu 4.15.0-43.46-generic 4.15.18 Uname: Linux 4.15.0-43-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.5 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Fri Jan 18 16:15:18 2019 InstallationDate: Installed on 2018-09-17 (123 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) PackageArchitecture: all SourcePackage: gnome-shell-extension-ubuntu-dock UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell-extension-ubuntu-dock/+bug/1812407/+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