developer tools no longer highlights page elements when inspecting them

When using the developer tools "inspect element" feature it used to highlight (and have a pop-up dialog showing information about) page elements under the cursor when selecting an element. With 6.2 that doesn't appear anymore. You can still select an element and the "elements" developer tools tab will still move through the HTML as you move your cursor around, but the relevant page elements aren't highlighted.

Hopefully I didn't miss a step while building. I did a full Qt build as usual and reproduced with qutebrowser (qt6-test branch) and simplebrowser.
I've only tested on Linux X11, although I don't think that is relevant in this case.