Steps to Reproduce:

1. Run command: /setblock ~ ~ ~ minecraft:resin_brick_wall[up=false]
2. Put a dirt path below the invisible resin brick wall
3. Run command: /setblock ~ ~ ~ minecraft:stone_brick_wall[up=false] (Note: Run this command at least 2 blocks away from resin brick wall, or its block states will update)
4. Put a dirt path below the invisible stone brick wall

Observed Results: After step 2, dirt path is still dirt path. In comparison, after step 4, dirt path turns into dirt. Therefore, it proves that resin brick wall without a center post is not a solid block.

Expected Results: Resin brick wall should be a solid block with whatever block states, like any other walls.

Additional information: Bedrock Edition is without this bug.