### 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 RBSet<TerrainConstraint>();
	}
	ERR_FAIL_INDEX_V(p_terrain_set, tile_set->get_terrain_sets_count(), RBSet<TerrainConstraint>());
	
	RBSet<TerrainConstraint> dummy_constraints;
	for (const Vector2i &E : p_painted) {
		for (int i = 0; i < TileSet::CELL_NEIGHBOR_MAX; i++) { 
			TileSet::CellNeighbor bit = TileSet::CellNeighbor(i);
			if (tile_set->is_valid_terrain_peering_bit(p_terrain_set, bit)) {
				dummy_constraints.insert(TerrainConstraint(tile_map_node, E, bit, -1));
			}
		}
	}
	
	RBSet<TerrainConstraint> constraints;
	for (const TerrainConstraint &E_constraint : dummy_constraints) {
		HashMap<int, int> terrain_count;
		
		HashMap<Vector2i, TileSet::CellNeighbor> overlapping_terrain_bits = E_constraint.get_overlapping_coords_and_peering_bits();
		for (const KeyValue<Vector2i, TileSet::CellNeighbor> &E_overlapping : overlapping_terrain_bits) {
			TileData *neighbor_tile_data = nullptr;
			TileMapCell neighbor_cell = get_cell(E_overlapping.key);
			if (neighbor_cell.source_id != TileSet::INVALID_SOURCE) {
				Ref<TileSetSource> source = tile_set->get_source(neighbor_cell.source_id);
				Ref<TileSetAtlasSource> atlas_source = source;
				if (atlas_source.is_valid()) {