However, Using a static stars frame (one taken from right before the pan down), and placing it above the auto cleaned layer with the blend mode set to “Lighten” does work pretty well for most of the shot - though of course it can’t be used until the Star Wars logo has gone, or it adds stars to the black area inside the words:
You can use the rotoscope tool in AE to easily create a mask for the interior of the STAR WARS title text to knock it all back to black. That’s what I did when I added the 1981 crawl to 4k77.