Thanks @mottenkiller. I've marked my bug, https://bugs.launchpad.net/ubuntu/+source/gnome- settings-daemon/+bug/1773589, as a duplicate of yours since you actually uncovered the mechanics of the problem.
** Package changed: apache2 (Ubuntu) => gnome-settings-daemon (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Server/Client Support Team, which is subscribed to apache2 in Ubuntu. Matching subscriptions: Ubuntu Server/Client Support Team https://bugs.launchpad.net/bugs/1780308 Title: calculator does not start using special-key on keyboard To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/1780308/+subscriptions -- Mailing list: https://launchpad.net/~enterprise-support Post to : [email protected] Unsubscribe : https://launchpad.net/~enterprise-support More help : https://help.launchpad.net/ListHelp

