Duplicate Proxy.newProxyInstance calls during PGXAConnection.getConnection?

In the PGXAConnection.GetConnection() [1], we can see the below code:

@Override
public Connection getConnection() throws SQLException {

// *the first time ConnectionHandler has been created.*
Connection conn = super.getConnection();

// When we're outside an XA transaction, autocommit
// is supposed to be true, per usual JDBC convention.
// When an XA transaction is in progress, it should be
// false.
if (state == State.IDLE) {
conn.setAutoCommit(true);
}

/*
* Wrap the connection in a proxy to forbid application from
fiddling with transaction state
* directly during an XA transaction
*/

// *ConnectionHandler is created again here. *
ConnectionHandler handler = new ConnectionHandler(conn);
return (Connection) Proxy.newProxyInstance(getClass().getClassLoader(),
new Class[]{Connection.class, PGConnection.class}, handler);
}

However I think the proxy has already been created at the first line:
super.getConnection(),
and then it is created later. Is it a duplication?

[1]
https://github.com/pgjdbc/pgjdbc/blob/master/pgjdbc/src/main/java/org/postgresql/xa/PGXAConnection.java#L86

--
Best Regards
Andy Fan