The gaffes, errors, problems and shortcuts in SW are all due to Fox nickel and diming everyone the whole time and then the final rush to get shooting finished with everyone bicycling between stages and multiple units going at once.
And that’s a big part of why it is great. And a big chunk of what the SEs remove.

Here’s one of my favorite “how did I not notice before!!”
I never realized it was Shane Rimmer who asked about Artoo in the Yavin hangar for the longest time-then suddenly my Bond fan radar went off into overdrive and I shouted HOW DID I NOT SEE HIM?

Also it took me forever to notice Vader’s helmet hood actually moving during the wind tunnel and climax of the Bespin duel.