As the title says: when I finish level 12 of the house (it's the one with all ice on the floor and no bucket. And one has to remove old wallpaint and recolor every other wall.)
After finishing with three stars in the overview, my character is in front of the door in the building but the stats and stars are still "new", meaning empty.

Does anyone else have this behaviour?

After finding the same issue on steam discussions, the "solution" is to finish level 13.

The issue is the that the star/points-displays of level 12 and level 13 in the house-view are mixed up with each other.