Just to let others know: @Plurto 's suggestion to set the dock transparency to FIXED (which makes the dock assume a static color) does not remedy the situation on my machines.
I tried with different transparency settings as well. The issue still exists -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799430 Title: Icon dock visible on lock screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell-extension-dashtodock/+bug/1799430/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
