GHman

I'm sorry for my poor english, but I'll try to explain the best I can.
I have noticed a weird problem with RAW timelapse on my GH3. I recently started using RAW images for timelapse because I can recover more detail from underexposed areas in post and get a wider dynamic range. Take a look at this video:
 
https://vimeo.com/66920197
You can see two timelapse tests that have been done with all manual settings (exposure, white balance, shutter speed and ISO). ISO levels are 125 for the first test and 200 for the outdoor timelapse. The clips marked with "A" are the RAW sequences straight from the camera, the ones marked with "B" have been modified in exposure with Camera RAW. As you can see, there is a noticeable color shift between some pictures: some of them tend to blue/green creating an ugly color flickering. This problem is evident in underexposed areas, especially after increasing exposure, whether I have sunlight or artificial light. I generally use a deflicker plugin for removing aperture flicker in a timelapse, but this solution can't work for color changes like this.
This is another timelapse test made in a room with a few light to better demonstrate the issue:
[attachment=521:noise color shift.jpg]
Picture 1 : RAW files before increasing exposure.  
Picture 2:  Exposure increased a bit for all the shots, apparently everything's fine.
Picture 3 : Further exposure increase reveals a shot with a much different color.
Picture 4 : The blue shot compared to the others.
 
If you want to replicate the issue:
1) Set all settings manually (WB,ISO,aperture,shutter speed).
2) Make a timelapse in a room with a few light in order to obtain very underexposed images.
3) Shoot at least 50/100 pictures.
4) Check the RAW files and increase exposure even if you can see noticeable banding.
Can you see some pictures with an evident color shift in the sequence?
  I have tried changing lens, but the problem has still happened. I tried many other software for editing raw files, but the color shift is still there. Sometimes the color shift can affects lot's of RAW photos, sometimes only a few why apparently no precise reason. I tried correcting manually the frames with shifted colors with no success. This is sad because the color flicker ruins the opportunity of using RAW for timelapse on the GH3.