Invisible Column from Oracle 12c

CREATE TABLE cust_details (
    cust_id               NUMBER,
    cust_name             VARCHAR2(100),
    cust_address          VARCHAR2(255),
    cust_account_number   NUMBER INVISIBLE
);

desc cust_details;

SET COLINVISIBLE ON

desc cust_details;

insert into cust_details values(1,'SCOTT','500,1A,california');
insert into cust_details(cust_id,cust_name,cust_address,cust_account_number) 
                         values(2,'JAMES','101,1A,Atlantic,08201',1234123412341234);
                         
SELECT
    *
FROM
    cust_details;

SELECT
    cust_id,
    cust_name,
    cust_address,
    cust_account_number
FROM
    cust_details;
    
update cust_details set cust_account_number = -9999
where cust_account_number is null;

alter table cust_details modify cust_account_number visible;

desc cust_details;

alter table cust_details modify cust_account_number invisible;

desc cust_details;

SELECT
    column_id,
    column_name,
    hidden_column
FROM
    user_tab_cols
WHERE
    table_name = 'CUST_DETAILS'
ORDER BY
    column_id;