When I set a limit for the max length of a text line and then on graphql I try to do a mutation with a length over the limit it will throw an exception saying: "Notice: Undefined index: eng-GB" if I use my custom locale "deu_DE" and it will throw one saying: "Cannot use object of type eZ\\Publish\\Core\\FieldType
ValidationError as array" if I use the "eng_GB" channel.