ORA-6550 error when executing a Function with a Proxy user (4376040)

When executing a Function in the database, whilst connected with a Proxy user, if there is a table in the database with the same name as the Oracle schema name, the error 'ORA-6550' appears. 

If this table doesn't exist, there is no error.

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Steps to replicate:

1. Create a proxy user:

CREATE USER PROXY_USER IDENTIFIED BY PASSWORD ;
ALTER USER EXISTING_USER GRANT CONNECT THROUGH PROXY_USER ;

Then check if the user proxy has been successfully created.
select * from proxy_users;


2. Log into SQL Navigator by PROXY_USER in the following way:

USERNAME => PROXY_USER[EXISTING_USER]
password => password_PROXY_USER


3. Create a function:

CREATE OR REPLACE
FUNCTION f_function
RETURN VARCHAR2 IS
BEGIN
RETURN 'OK';
END;
/


4. Create a table with the same name as the schema name (it can be the most basic table)


5. Once that table is made, execute the f_function with the proxy user and the issue will appear.


6. Drop the table with the same name as the schema and when you execute the Function again, it works.