Profile field type Enumeration doesn't allow to use '@' character

[claudiomerli]

I need to use a list of predefined email as a field of a profile type of Entando user. But if I add for example this value inside the "Elements" text field :
email1@gmail.com,email2@gmail.com
it show me the error:
Insert a configuration like "label1,label2,label3"

Characters @ and . breaks the validation