After a server action redirect (or a Link navigation) in Next.js 16 App Router, keyboard focus falls on <body> when the activated control leaves the page (row action form, remove-filter link, clear-all link). Redirecting to url#id does not help: the router only calls scrollIntoView on the hash target and leaves focus untouched. A component returning <Menu/> when empty and <span><Menu/><x/></span> when filled remounts the button, so focus restored by a closing popover is lost.