Diving some more into this, the above example is actually how the CR2 file is displayed in preview in MacOs.
As you can see, weird highlight clipping, where the reds and blues become suddenly darker intowards the lights. (The negative luma describe by Ilia in the first post)
Now, the file looks normal on Google drive.
Here's a side by side, Google drive on the left, MacOs on the right.

Opening the file in most raw editors, it looks perfectly fine...
Opening it up in Lightroom (in this case LR 5.7), on the camera calibration tab -> with "adobe standard" profile, it looks not that good.
Changing the profile to the Canon profiles, for example, the profile "Camera Neutral" it looks much better.
Going back "adobe standard" and changing the processing version from 2012 to 2010...you start crying

So most software get's it right, some don't, like Adobe and MacOs.