When slark use his ultimate, he doesn't disapear from minimap like everyother invis unit, instead it leave a little dot (similar to a creep dot)

On the video, I took one of my old wc3 replay (seems enough since war3 replay doesn't show enemy on minimap unless they are visible) I used fast search in changelog on getdota and didn't found any reference to something like "slark now leave a dot on minimap when using ultimate". So I guess it didn't changed since that moment. New test are obviouly welcommed, but they need two player (test map cann't do the trick imo).

Edit: the quality of the video aint great, if needed I might try to upload the same one with higher quality