Hi Johann, thanks for the feedback! For the purpose of clarity, things are kept quite simple in the onboarding videos.
You can use the “Unfocus input” flow function from the flow function market to achieve this behavior after the Save button has been clicked - that also dismisses the keyboard. The text input field has a onBlur event on the logic canvas, you can use “set internal property” flow function after that to set the input’s value to blank.