Level Instance Loaded On Start Editor

I have a lot Level Instance Actor in World, and set Level Instance Actor’s DataLayer Unload. Because Level Instance Actor has many Acotr , I don’t want to Load them.But When Start Editor , It’s looks like Loaded all Actors in Level Insatance, then Unload them(may be datalayer is unload). So, I have to wait a long time to start Editor.
Is there any way to solve it?