DBDebug unexpected behavior

In false it will always run your SQL and should return false in case of failure**. What kind of stop are you seeing? Does the entire page crash and return white? Or do you mean it stops executing the following queries. Please provide code or more information about the matter.

That flag will enable you too see the errors messages* instead of returning false. It won't prevent bad code.

* throw as \CodeIgniter\Database\Exceptions\DatabaseException
** Haven't confirmed this.