Support for references
In KeepassXC and possibly other managers, you can specify the password or the username to be a reference to another entry, so if you have the same logins for multiple website you can still have them seperated but always using the one master password. Using the reference is working, while inside the list view but when editing an entry and clicking on the copy button it actually copies the {REF:...} part and not actually the referenced password.
Also there is no way to add such references or edit them in a good way.