DxO has fixed color cast issues before (e.g., PhotoLab 2.2 and 2.0.1). They might be able to fix the magenta cast for the G9 also. The G9 issue (magenta cast when lifting shadows +3 EV or more) has been discussed on the Internet for over a year now, but maybe no one’s reported it to DxO as a bug yet. I’ve seen even worse performance reported for the Panasonic GX9 using ACR - hopefully that’s not a big problem with PhotoLab now. (It was discussed here as a PhotoLab issue a while back.)
I also suggest making sure your camera’s firmware is up-to-date.