Structure generating one block in the ground

i genuinely have no clue why it's doing this, heres the structure json { "biomes": ["jungle", "bamboo_jungle", "sparse_jungle"], "liquid_settings": "ignore_waterlogging", "spawn_overrides": {}, "type": "minecraft:jigsaw", "start_pool": "ddp:jungle_hold/jungle_hold", "size": 7, "terrain_adaptation":"beard_thin", "step": "surface_structures", "project_start_to_heightmap": "WORLD_SURFACE_WG", "start_height": {"type":"constant","value":{"absolute":2}}, "max_distance_from_center": 116, "use_expansion_hack": false }