It's actually the browser's default behavior to do what you're describing! Inside a `contenteditable` element, links no longer behave as links -- they aren't clickable, and hovering over the link doesn't show a preview of the HREF attribute in the browsers I've tested. So in order for links to do link things, we have to fight the browser and re-implement these behaviors.
Here's a codesandbox with no JS to demonstate this: https://codesandbox.io/embed/optimistic-resonance-jbyeef?fon...
I created a task to track this bug internally. I think we can probably solve by calling preventDefault for the middle-click event if it bubbles up from inside a link.