Well then the darkness adaptation is broken. Because when the sun is low and you go into the shadow of a crater, it is pitch black in there. Either the darkness should always be dark, or the darkness adaptation should always work.
It isn't normal Human light adaptation obviously. Otherwise it wouldn't work near the sun (we'd just be blinded). I think they peg the adaptation to the ambient light (day night side) not the cliff/crater shadow crater you're in, otherwise the areas outside the shadow would become blinding.
And yes it is the same adaptation algorithm they use for getting closer or more distant to stars. I know because I reported it as a bug in DEC 2015 when Horizons launched, and got the same answer from Frontier. It's intentional. And plausibly sci fi realistic.
I've tested this quite thoroughly, the ultimate one being the quality of darkness on the night side of Beagle Point planets!! 65000 LY for a lighting test?? You bet, for Science.
It's supposed to be a gradual transition but it's broken in a couple places like near Obsidian Orbital.