I belive its a trait of the film, but Scanning and film profiles definietly come into play IME. My first ever roll, they year it was introduced, had a terrible blue cast when scanned on my (then, top of the line) Minolta Scan Elite 5400 I. Shots were taken under a grey, heavy overcast Fall day, with no fill flash. So the color temperature was definitely cool, and Ektar exaggerated the blueness and introduced a blue cast to all images shot under this lighting - a problem I had never, ever encountered with any other Kodak negative film and had in fact only read about this phenomenon happening with Provia under similar conditions. However, when I took the same negatives to be scanned at a lab on a Noritsu, the images came out with perfect WB. The Noritsu appartently had a film profile, or much better algo for handling Ektar than the 5400 did. And it should, given it is a $25,000 scanner!
Nowadays, I have a Pakon (Kodak) f235+ minilab film scanner (a $12,000 scanner, way back in the day - 2004/5ish, only a grand nowadays), and it too scans Ektar well. At least, it does for flowers and sunsets, my main use for Ektar now.