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.
What drives me nuts is the the SE’s were supposed to remove mistakes and they just added in more. So many of GL’s changes don’t actually fix any continuity errors. They fix things GL didn’t like and thought they could do better. He left just about every gaff from editing alone and ended up adding more. The Rock in front of R2 doesn’t fit. The windows in Bespin aren’t consistent. The larger door to Jabba’s palace is only larger on the outside (the inside shots are of the same smaller door).