Wrong Gain Factors on UEye camera + PyUEye

Question

I'm trying a bunch of IDS Ueye cameras and I happen to have a problem with the default values. When I launch ueyedemo on my Ubuntu 18.04, I get images like this:

But when I use the application's File -> Save Image I get an image like this:

Anyway, I can correct the result to real life colors by going to uEye -> Properties -> Image where I change these gain values:

To these:

And get an image like this:

A colleague of mine has tried the camera on Windows 10 and this does not happen. I'd either like to know how to solve this via UEye configuration or via PyUEye, because there seems to be no documentation of the library available online.

For the moment, I'm using the standard example code that IDS provides, found here: Link

I've found nothing after a while searching. Is there any documentation? Is this a known issue?

Thanks! Any help is appreciated.