The bug

When you load a structure that includes either mossy_cobblestone_wall or normal cobblestone_wall, the directional block states (east, north, south, west) don't update upon loading the structure with a rotation

How to reproduce

1. Give yourself a structure block

   /give @s structure_block

2. Place a cobblestone_wall on top of the block and place another (solid) block next to the wall
3. Save the structure and remove the block next to the wall
4. Load the structure → the wall will have the same block states
5. Load the structure with a rotation → the wall will still have the same block states