Full contact name cannot be edited properly

[bamyasi]

In KAddressBook version 5.2.3 (KDE Frameworks 5.28.0), it is not possible to remove or change parts of the contact's name after full name was initially created. You go to Edit->Edit Contact, select ... button next to the Name field, make changes and click OK button but the changes are not reflected on the main KAddressBook window, neither they are used in actions (e.g. new e-mail message is created using old name version). Also, VCF file contents at $HOME/.local/share/contacts/ are not updated either: they always list initially created version of contact's name. Restarting KAddressBook and/or KMail does not help. Neither do restarting akonadi server.