Syntax highlighting issue with 'Z' characters in packages (4239971)

There is a syntax highlighting issue in v7.0 when you enter the following script:

CREATE OR REPLACE
PACKAGE aaaaaa
IS
   PROCEDURE x;
END;
/

CREATE OR REPLACE
PACKAGE BODY aaaaaa
IS
   PROCEDURE x
   IS
   BEGIN
       DELETE FROM abc.co01_part t1
             WHERE t1."/BIC/ZKO" = 'Z';
   END;
END;
/

Everything after the 'Z' character makes the procedure look as if it was commented out.

It doesn't matter whether the "Z" is in the "WHERE" condition, or as a table column:
Example 1) where = 'Z'
Example 2) 'Z' as <column name alias>

If you change 'Z' to a 'A' or 'B' the syntax highlighting works normally.
If you delete the "Z"  from 't1. "/ BIC / ZKO"' and write  t1. "/ BIC / KO" = 'Z' , it also works

WORKAROUND:
Please use v6.7 for this functionality

STATUS:
Waiting for fix in a future release of SQL Navigator for Oracle