Safari reported a lethally-slow script running. I killed script. (I keep this open on main window, generally.)
Sent in report.
Immediate ack w/thanks, "we'll look into it". Task #.
Tried site an hour or so later (my local weather monitor station) -- fixed.
Today, note from WG reporting the fix.
Short, sweet, fixed.
Yes, I know it's supposed to work that way, but ...