No messages by perfoming a Function After Data Change - Web Interface Build

Hey Xperts,

I have a problem to see messages, when I perform a Function via WEB - Function After Data Change.

You can select by costomizing a Subcomponent "Layout" that a Function can be performent by the feature "Function After Data Change".

But when I run the function there is no message in the message tray.

When I run the function via Button, there will come up a messages.

Is this a buk or a feature.

How can I see message by performing a Function After Data Change ?

Thanks for help.

Thomas