This here is something that bothers me for quite a while now. I think it was introduced with Toad for Oracle 13.3 and it's still there in 14.2:
In the Editor, a sql statement may be truncated by its last 3 characters, if there are 3 or more leading tabs.
So, for instance:
select * from dual where 1=1234;
yields (of course) no result, whereas
[tab][tab][tab]select * from dual where 1=1234;
actually gives a result!
Took me a while to find out that this was only due to the leading tabs. Until then I always used TOAD 13.1.1 if I wanted to executed SQL queries in the editor...
Or is it just me?