Hi Makigirl,
I tried your scene with the new hdri and increased Static Lighting Level Scale from 0.1 to 0.4 and it still looks quite good, except of Some parts of the walls, see on screenshot.
Red issue - maybe because of only one front face on UV with very little padding.
Yellow issue is clear - different meshes makes this strange different shading issue… Hm… On SLLS 0.1 it is almost disappear.