I have been testing. I don't see a bug
 Code:
;Script Options
$SO=SETOPTION("Explicit", "ON")
$SO=SETOPTION("NoMacrosInStrings", "ON")
$SO=SETOPTION("NoVarsInStrings", "ON")
BREAK ON

Use * /DELete /persistent
? @KIX
? @SCRIPTEXE

Get $SO

some results
 Code:
4.53
WKIX32.EXE

 Code:
4.60
KIX32.EXE

 Code:
4.60
WKIX32.EXE