Icons not showing in buttons inside popups

Any buttons created on the page normally show icons and icons are seen when in edit (divi visual builder) mode. But once you exit the visual builder any icons added to a button on the left that are also inside a popup are gone. Icons show just fine in any button outside of a popup, but inside the icon is gone.

Upon inspection I found the following code:

.et_pb_button:before {
display: none;
}

But changing it to display: contents doesn’t work and the icon’s don’t display correctly. I have no idea where that code is coming from and why it’s only in play inside of the pop-up boxes.

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