KeePass(XC) has a support for field references. When you set e.g. the pasword field to refer to the pasword field of another entry, you probably mean by that, that those fields should always have the same value. Even when the password changes. But currently it doesn't work this way.

Expected Behavior

When you change the password for one site, the passwords for related sites should change too.

Current Behavior

When you change the password for the site that contains a password reference, the reference is overwritten and replaced by the new password.

Possible Solution

Though the support for field reference in KeePassXC is less than basic, I guess that the described behaviour should be implemented at the KeePass-Browser side. I think that the implementation will be pretty easy.