[FORMINATOR] issue with Single Choice as Required field

When making Required for Single Choice it still allow to send form. By default form select take first value as first one and form can be send.
You can change which value will be the default value, but still the form can be send. What is the point of Required option for this?

Let's say that I don't want a default value to be selected. I need users to pick one value. My specific examples is this:
Pick your budget:
$1k,
$2k,
$3k
I want the first option to be a placeholder option with no value