Iron golems can hit players through walls

When I hit an iron golem I went into a village house to heal but it killed me through the wall.

Steps to Reproduce:

1. Build a 6x6x6 room with opaque block walls.
2. Add a small entrance to the room (door, fence gate)
3. Spawn an iron golem into the room.
4. Aggravate him (punch) and quickly leave the room.
5. -Stand next to one of the exterior walls of the room.-
6. Move back and forth along the exterior of the closed area (may take a few minutes).

Observed Results:
The iron golem hits the player through the wall.

Expected Results:
The iron golem should not be able to hit the player through the wall.
Keywords for search: attack hostile aggressive damage harm