I don’t know if it was discussed before or not, but there is a continuity error in the movie.
On the Endor moon, when Luke talks to Leia, he says:“Vader is here…now, on this moon.”
And then we see that he is not. He arrives when Luke is delivered to an imperial base.
From the script:"EXT .FOREST - IMPERIAL LANDING PLATFORM
An Imperial shuttle floats down from the Death Star and lands gracefully on the huge platform.
Now, an Imperial walker approaches the platform from the darkness of the forest. The whole outpost - platform, walkers, military - looks particularly offensive in the midst of this verdant beauty.EXT. IMPERIAL LANDING PLATFORM - LOWER DECK
Darth Vader walks down the ramp of the shuttle onto the platform, …"Can this be fixed in this edit?
No need. It was made self-evident during the approach to Endor on the shuttle that Luke sensed Vader and that likewise, Vader sensed his son. There is no continuity error in the scene as it is. “Vader is here now, on this moon” in the Star Wars universe is like saying ‘Vader is here now in this system’. Means the same thing - especially when trying to hurriedly convey to Leia why he must leave the group. “Here now, on this moon” is the urgency Luke needed to convey to her, so she would accept his decision to depart.
Besides, there is a musical flow to the editing in the sequence in which it transitions from the Ewok village to the shuttle landing. I’d hate to lose that.