@Zelda King : I think I know why ...

We didn't use a submit button for the Google bloc because we don't want the current page to be reloaded.
We used instead of this a Type="button" with an attribute onClick which
has to be clicked to work
I think the member who reported this "bug" press enter on its keyboard and "validate" the form which has no mean here because to work, you have to click on the button 'Go'
Check it but I'm sure it what he does