Google UTM parameters not compatible?

Hi! Just downloaded the widget + put in in place as a test on my /blog page. Any idea why when I type in the destination URL as /contact-us/?utm_source=Main-Sidebar&utm_medium=Banner&utm_campaign=Advertise-With-Us, it doesn’t show the UTM in the source code?

It’s obviously super important to be able to track clicks to ads, so I think I’m missing something ha…. thanks!!

The page I need help with: [log in to see the link]