#1207 SQL Parametrisation : incorrect parameter marker detection

[vazymimil]

Exemple :
when executing VALUES (:parm, :parm)
SQuirreL asks for parameters (:parm and :parm

when executing VALUES (1 ,:parm, :parm)
SQuirreL asks only for :parm, but result suggests ":" is still in the final statement
A statement contains a use of an untyped parameter marker, the DEFAULT keyword, or a null value that is not valid.. SQLCODE=-418, SQLSTATE=42610, DRIVER=4.12.55 SQL Code: -418, SQL State: 42610

when executing VALUES (1, :parm, :parm)
(with a space between comma and :parm)
everythings OK

[vazymimil]

when executing values(case 0 when :parm then 1 else 0 end)

if value entered is digits only result is
An unexpected token "when1" was found following "values(case 0 ". Expected tokens may include: "WHEN".. SQLCODE=-104, SQLSTATE=42601, DRIVER=4.12.55 SQL Code: -104, SQL State: 42601

Same with two spaces works OK
values(case 0 when  :parm then 1 else 0 end)

Equivalent with string values works OK
values(case 'a' when :parm then 1 else 0 end)