Why do these two JavaScript regular expression produce different results?

Question

First, I have:

const regEx = /(?:\S+\s)?\S*text\S*(?:\s\S+)?/;
const fullText = "one two text three four";
console.log(fullText.match(regEx));

which results in

[ 'two text three', index: 4, input: 'one two text three four' ]

Then I have:

const regEx2 = new RegExp("(?:\S+\s)?\S*text\S*(?:\s\S+)?", "g");
const fullText2 = "one two text three four";
console.log(fullText2.match(regEx2));

which results in:

[ 'text' ]

Using new RegExp, how do I get the same result as the first block of code?