In Toad 12.7, edit statements spanning multiple lines show an error when run with F9 (4241242)

There is a difference in behaviour between 11.6 and 12.8 when running Edit statements spanning multiple lines, e.g.,

edit employees
where emp_id =1;

The following issues exist:
(1) Edit statement on 2 lines produces an error in the editor.
(2) Edit statement on 2 lines displays an error message rather than the result.
(3) Edit statement with semicolon at the end displays an error message rather than the result.

When you run this with F9, the following error appears:
'ORA-00900: invalid SQL statement'