As your formula currently stands, if someone makes a mistake entering in the search field, they will need to restart the app to try search again..
Imagine you went to google to search, and because there were no results found it hid the searchbar from you so that you can't search again - that's what yours is currently doing
I would change that Visible property of TextInput1 to true
I would want the search bar always visible - that way if someone makes a mistake when typing they can backspace/change what they are searching for until they find what they need
Is there a specific reason you hid it when an incorrect value is typed in?