Six shots taken within the space of two seconds. All with the same: ISO (6400); shutter speed (1/320s); aperture (f/11); and a fixed white balance. They should all look much the same. I think you may well be able to see some of the problems I've been having! Though note outdoor area in the photos (i.e. the well lit area) does not have as bad a colour cast as the shadows.

Fault finding isn't always easy. Some faults are swines to locate, especially when they're intermittent. Trying to convince someone else that there's a problem with, for example, this camera before the warranty expires, adds an additional challenge. I think I found a way of doing so.