### Godot version

v4.2.rc2.official [1ba920fad]

### System information

Godot v4.2.rc2 - macOS 14.1.1 - Vulkan (Forward+) - integrated Apple M1 - Apple M1 (8 Threads)

### Issue description

Crash when trying to use "cell_quadrant_size".

The same project works without problems in 4.1.3

### Steps to reproduce

Open the attached project and run it, it'll crash. "Invalid get index"
![スクリーンショット 2023-11-27 16 35 07](https://github.com/godotengine/godot/assets/106015575/50d38ceb-0e6e-49bc-96dc-60abd1d2b6c0)

Here is what the same project looks like when launched from 4.1.3:
![image](https://github.com/godotengine/godot/assets/106015575/4e7e1f1a-ad5b-40ab-90ae-35130c803f09)

### Minimal reproduction project

[engage bug 03.zip](https://github.com/godotengine/godot/files/13471828/engage.bug.03.zip)

const Ref<TileSet> &tile_set = tile_map_node->get_tileset();
	if (!tile_set.is_valid()) {
		return HashMap<Vector2i, TileSet::TerrainsPattern>();
	}
	
	RBSet<TerrainConstraint> constraints = p_constraints;
	
	HashMap<Vector2i, TileSet::TerrainsPattern> output;
	
	for (int i = 0; i < p_to_replace.size(); i++) {
		const Vector2i &coords = p_to_replace[i];
		
		TileSet::TerrainsPattern current_pattern = TileSet::TerrainsPattern(*tile_set, p_terrain_set);
		TileMapCell cell = get_cell(coords);
		if (cell.source_id != TileSet::INVALID_SOURCE) {
			TileSetSource *source = *tile_set->get_source(cell.source_id);
			TileSetAtlasSource *atlas_source = Object::cast_to<TileSetAtlasSource>(source);
			if (atlas_source) {