Galaxy S6 :: Overly Saturated Screen After Reboot

So I got a S6 G920I last week, and I had to return it because the home button was kind of loose, and it was making a fun noise every time I pressed it. Now I have the replacement working fine, but I noticed something rather odd.

When I restart the phone, if I enter my SIM pin and unlock the device immediately after restarting (i.e. without letting the device to turn off the screen) I'm getting overly saturated screen colors, to the point that my wallpaper looks completely different.

The problem goes away after turning the screen off and on.

1. Press and hold the power button
2. Tap on Restart
3. Immediately after the device restarts, enter you SIM pin (if needed). Don't let the screen turn off.
4. Unlock the device

After step 4. I'm seeing the device with a completely different screen color. Blacks are way to black, and generally looking very weird. As I said the problem goes away after turning off and on the screen.

I'm adding some (very low quality) pictures, so maybe you can notice the issue. In the normal picture, you can see some diamond shapes in the wallpaper, but in the saturated image you can't because of the high contrast colors.