[2022] Changed difficulty settings to default in Svartalfheim and reloaded back in England with settings unchanged

Weird. I loaded the game (save made at 7.58 this morning) and did the two Reda quests and during these I gained a Mastery point. I then went to Svartalfheim to do the Kára/Reda thing, talked to Reda and accepted the quest. I had looked at difficulty settings yesterday but forgot to change them back, so I then used the Y-for-default option and clicked A to reload.

I started again in Ravensthopre. Now the game remembered the new Mastery point so it's not reloaded the 7.58 am save I made previously. It put me back in the wrong map.

That description is enough information to attempt to replicate, no need for a picture or video.