Steps to reproduce:
- In Nuxeo Studio:
- Create a schema with a field called "AccountManager"
- Select "User/group" as data type of the field "AccountManager"
- Create a custom document type and associate our schema that includes the field "AccountManager"
- In View designer
- Create a custom view for our document type
- In Nuxeo instance
- Deploy the changes in your Nuxeo instance
- Create a new document of our custom doc type
- Access the "View" screen of your custom document type.
- The value of the field "AccountManager" is shown as [object Object]
More details in private comment