The CB field mapping is not working for the "full name" custom field that I created. I have mapped it to "formatname" of CB and is not filling in the data for the loggedin user.
Haven't used CB for long time but I think full name is a special field in CB which data from that field not entered directly by users (it is calculated from data of other fields like first_name, last_name), so we don't have support for it yet
I will have to see how CB calculate data for that field and add support for it in future (next release)