Using the nonfree network 64bit install. It says "Mageia 6 sta2" on the sidebar. During the install process, the screen will go black at around 10 minutes remaining. When you move the mouse, it starts to uncover the image again, except it looks like

(or view the attached image file).
As you will see, the installation was able to proceed beyond package installation, so the installer itself is still working fine. It is just the visual that is wonky.