Many comments I have read state that it's the scanning process that causes this shift, such as the green cast is due to underexposure, and the scanner (i.e. the scanner software) is trying to bring up the shadows causing the color shift
Of course you could do some testing with a ColorChecker (Color Rendition Chart) in the photo under different conditions... but who does that type of test images
I guess I would try to set up the same situation as in number four and do some bracketing exposure tests. I do see some shadows in the last image so the lighting might have changes as you moved out away from the entrance. Also if you look at the wall next to the door there is a dark gray rock just below the level of the iron hinge... you can see the color shift in that rock from image 2 -> 3 -> 4 (it's kind of like a gray card that shifts).
So... I have similar results from time to time and not sure if its exposure, scanning, color temperature, or all of the above hahaha.
I purchased some Porta 400 in 120 format so even though I have no way to scan it, I will expose some rolls in the near future . I have been pricing scanners (Epson GT-X820 is the same as the V600 in the US only it's 100 USD more expensive here ).