Dock hidden after unlocking screen with multiple monitors

[Florian Bach]

I'm running Ubuntu 20.04 with gnome-shell-extension-ubuntu-dock version 68ubuntu1~20.04.1.

I have multiple monitors (three) connected to my Ubuntu machine, and I've set the middle screen as the "main" one (the one where the Dock and the top bar are displayed on).

When I have an application running in Fullscreen (for example, Chromium) on the middle monitor where the dock is, everything is working as intended. I can lock the screen, unlock it again, and everything is like I left it.

If I do the same thing (application in fullscreen) on the right monitor, everything works just fine, too.

However, if I run a fullscreen application on the left monitor, then lock and unlock the screen, the dock on the middle monitor is gone. The top bar (the one that says "Activities", the application name, current date & time, ...) is still present, but the dock is gone. I either need to disable fullscreen in the application that's on the left screen, or I click on the "Activities" button to open the app drawer.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gnome-shell-extension-ubuntu-dock 68ubuntu1~20.04.1
ProcVersionSignature: Ubuntu 5.4.0-72.80-generic 5.4.101
Uname: Linux 5.4.0-72-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sun Apr 25 14:24:39 2021
InstallationDate: Installed on 2019-08-17 (617 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
PackageArchitecture: all
SourcePackage: gnome-shell-extension-ubuntu-dock
UpgradeStatus: Upgraded to focal on 2020-05-09 (350 days ago)