The behaviour of the "Dictate text" action in a shortcut on iOS is inconsistent between the app, Siri and Homepod Mini.
I have created a shortcut on my iphone (iOS 16.2) called "ask John" which uses the "dictate text" action.
If I click on the shortcut, Shortcut asks me to say my text. I say"How Lake Geneva was formed" for example. The text returned by the action is exactly "How Lake Geneva was formed".
But if I call the shortcut with Siri "Hi Siri, ask John" Shortcut asks me to say my text, I say "How Lake Geneva was formed" but the action only returns "Lake Geneva" The beginning and end of the text has been lost. (I test in French)
If I do the same thing with my Homepod Mini (Version 16.2) "Hi Siri, ask John" Shortcut asks me my text, I say "How was Lake Geneva formed" but there, the shortcut is stopped, it's the "real" Siri that takes over and wants to search the web for the answer.
The "Dictate a text" action is totally inconsistent depending on how and where it is performed.