I’ve detected an error in V3 - it’s during the siege cannon run right after Finn yells ‘Rose’ and there is the shot of the Resistance officers. There is a single frame of Leia before cutting back to Finn.
Spotted it! By doing a frame by frame. As you say, it’s a single frame ‘fade in’ of Leia and 3PO.
I think it would be invisible if it wasn’t for the gold of 3PO being so contrasting against the darker lighting in the shot before.
Anyhow, its @ 1:55:24
I’ve checked it against the temporary V3 that Poppa released a few days ago and it’s not present there, but it has cropped up in the final/proper release somehow.
Aww well, I’m sure we’ll live 😃