As of 14:50 (GMT+1) the current state on links (both class tag in the UI and the actual CSS input) no longer shows in Designer. Current state shows on the published site.
Edit: Editing font weight not showing in the UI too…
Edit 2: When I go to Link settings for a link element, remove the page link, and then add the page link again, the Current state shows in the UI again, but disappears when I deselect and re-select the link element.