If contacts cannot be transferred to the CardDAV server (Radicale), the user will not receive any information. As a user, I therefore never know whether my contacts have been successfully transferred or not. Suggestion: Brief display, whether all contacts were successfully transferred to the server or not.
I don't use CardDAV but you don't have messagebox when it's not transferred ?
Unfortunately no. The contacts are ignored without error message.
I have the same problem again with a fresh, clean Akonadi installation. My vCards are not fully transferred to Radicale! Unfortunately I don't see any error message.