Because the binnacle pulls the light/dark setting from the infotainment, when the infotainment is not available because it is rebooting or the like, the binnacle reverts to the default setting which is apparently the light setting. Why it doesn’t use the setting it last got from the infotainment I don’t know.
Once the infotainment can be contacted again, it will fetch the setting and use it.
I noticed this same behavior when I had to force reboot the infotainment a while back after it refused to recognize my phone. In the OP’s photo and description, it does seem like the Infotainment system had crashed and was rebooting.