If restart gnome-shell using the following in a terminal... gnome-shell --replace
...then the dock behaves normally, launching one instance of an application for each tap I do see some errors after I do this, but they may be unrelated, since it works fine after issuing the above command. (However the error "ubuntu-dock [...] unreachable code after return statement" seems a bit suspicious). $ gnome-shell --replace Gjs-Message: 22:08:47.482: JS WARNING: [resource:///org/gnome/shell/ui/main.js 340]: reference to undefined property "MetaStage" Gjs-Message: 22:08:47.495: JS WARNING: [resource:///org/gnome/shell/ui/layout.js 220]: reference to undefined property "MetaWindowGroup" Gjs-Message: 22:08:47.525: JS WARNING: [resource:///org/gnome/shell/ui/osdMonitorLabeler.js 59]: reference to undefined property "MetaDBusDisplayConfigSkeleton" current session already has an ibus-daemon. Gjs-Message: 22:08:47.759: JS WARNING: [resource:///org/gnome/shell/ui/slider.js 38]: reference to undefined property "CallyActor" GNOME Shell-Message: 22:08:47.804: Telepathy is not available, chat integration will be disabled. Gjs-Message: 22:08:47.998: JS WARNING: [/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/appIcons.js 1027]: unreachable code after return statement Ubuntu AppIndicators-Message: 22:08:48.361: [AppIndicatorSupport-DEBUG] Registering StatusNotifierItem :1.62/org/ayatana/NotificationItem/software_update_available GNOME Shell-Message: 22:08:48.492: Error looking up permission: GDBus.Error:org.freedesktop.portal.Error.NotFound: No entry for geolocation Gjs-Message: 22:08:57.112: JS WARNING: [resource:///org/gnome/shell/ui/keyboard.js 822]: reference to undefined property "label" (gnome-shell:2512): GLib-GObject-CRITICAL **: 22:09:01.792: g_object_unref: assertion 'G_IS_OBJECT (object)' failed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1725384 Title: On touch screens, the apps icon in the dock does not open when touched To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell-extension-ubuntu-dock/+bug/1725384/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs