### Godot version

4.1.stable

### System information

Godot v4.1.stable - Windows 10.0.19045 - Vulkan (Compatibility) - Intel(R) HD Graphics 4600 (Intel Corporation; 20.19.15.5126) - Intel(R) Core(TM) i3-4330 CPU @ 3.50GHz (4 Threads)

### Issue description

When I try to join 68 images of 128x128 resolution in an atlas it returns a transparent 1x1 image

I tried using few images and it doesn't work either

It doesn't work either with 16x16, 32x32, 64x64 resolutions

- Google Translate :)

### Steps to reproduce


https://github.com/godotengine/godot/assets/136469511/ca5f64c2-f0c5-486f-a13e-b941ae2dea7d



### Minimal reproduction project

N/A
ERR_FAIL_COND_V(!tile_set.is_valid(), false);
	if (read_only) {
		return false;
	}
	if (p_from == sources_list) {
		Dictionary d = p_data;
		if (!d.has("type")) {
			return false;
		}
		
		if (String(d["type"]) == "files") {
			Vector<String> files = d["files"];
			if (files.size() == 0) {
				return false;
			}
			for (int i = 0; i < files.size(); i++) {
				String file = files[i];
				String ftype = EditorFileSystem::get_singleton()->get_file_type(file);
				if (!ClassDB::is_parent_class(ftype, "Texture2D")) {
					return false;
				}
			}
			return true;
		}
	}
	return false;
}
void TileSetEditor::_update_sources_list(int force_selected_id) {