Hi,
I have same issue like this topic, when I use Unity 5.6.7f1 and 2dtoolkit 2.5.8.9.
I upgrade to Unity 2017.4.27f1, then the Never ending issue was gone.
Never ending "Rebuilding Index"
https://2dtoolkit.com/forum/index.php?topic=4269.0I upgrade to Unity 2018.4.1f1 and 2dtoolkit 2.5.8.16.
But empty Element is still there,
How to clear empty Element?
![](https://i.imgur.com/zQX8LpJ.png)