When you're working with an Articulate Engage interaction in Articulate Storyline and you go to Options > Open, the interaction will launch in your default browser, so you can preview it in a separate window. (The same thing occurs when you right-click an Engage interaction placeholder, scroll to Web Object, and click Open.)
When you're previewing an Engage interaction in this manner, you may notice that the browser title bar doesn't match the interaction type that you're actually using.
This is a known issue. It won't affect your published output.