WizardImageFile does not work in Inno Setup 5.5.8

I installed the latest version of Inno Setup v5.5.8 (a) and now I can not view the WizardImageFile bitmap file in my installation wizard. It worked just fine in a the previous version. Am I doing something wrong or its a bug? Here a script example I created with the help of the Inno Setup wizard it self.

Of course the setup_inno.bmp and setup_inno_small.bmp are in the same folder as the iss script file. The small image works just fine and the setup_inno.bmp is 24bit color depth (Windows format) with 164X314 pixels width and height.

Any recommendation?

Regards,

#define MyAppName "My Program"
#define MyAppVersion "1.5"

[Setup]
AppId={{EF909D9F-7C2F-46E8-9BBF-C65D3323A436}
AppName={#MyAppName}
AppVersion={#MyAppVersion}
DefaultDirName={pf}\{#MyAppName}
DisableProgramGroupPage=yes
OutputBaseFilename=setup
WizardImageFile=setup_inno.bmp
WizardSmallImageFile=setup_inno_small.bmp
WindowStartMaximized=yes
WindowShowCaption=no
WindowVisible=yes
BackColor=$000000
BackColor2=$FFFFFF

Are you aware that the Welcome page is by default skipped since Inno Setup 5.5.7?

As recommended by Microsoft's desktop applications guideline, DisableWelcomePage now defaults to yes. ... The defaults in all previous versions were no.

So you can actually see the WizardImageFile on the last (Finished) page only, not on the first (Welcome) page already as previously.