Dragging a Safari tab into an other one
This was a cool feature it used to work perfectly back in Monterey, since Ventura it's completely broken.
If you drag a tab into an other Safari tab, the title of the tab remains frozen on the screen.
If you drop it out of a Safari window, it opens a new Safari window (as expected) but gets shadowed for no reason.
MacBook Pro 13″, macOS 12.1