IOS Shortcuts - Start Vacuum Cleaner with Siri

Hello everybody,

I created a shortcut on my iPhone, and added Home-Assistant Call Service (script.vacuumcleaner-start).

If I run this script in Services on my phone or on my computer my Vacuum Cleaner starts.

Interesting but when I tell Siri to start this Service with the name of the created Shortcut its says:

“Failed to call service with error: Unable to parse stored payload”

Any Idea what causes this error?

Thank you very much.