When using Chrome or Safari, you are unable to click the 'Toggle Controls' button, because the tooltip appears right over it. In Edge this works fine.
Toggle Controls only becomes visible when you make your screen so small it thinks you are on a tablet/phone (If it is just a tablet/phone, why is there a tooltip in the first place?).
You can see this in action in the first few seconds of this video: https://youtu.be/3xcgtCZeklI (which explains the problem of