Now it should show my screenshot with the level bounds of one of my loaded sublevels.
Levels should be kept in one directory, because it looks cleaner. I’m going for huge worlds as well.
Maybe uncombined levels can cause glitches, because sometimes even I’m getting strange behavior like completely offset splines and objects when loading levels in a certain order or when I play with actors from certain sublevels, but I couldn’t reproduce it and whenever that happens I need to restart UE without saving, because it could destroy my level. The editor is not perfect or stable.
It’s good to restart from time to time to free RAM again (even with much RAM) and to prevent strange glitches that occur when the editor is open for a too long time.
It (too large level bounds) happened even to me with one level, but I suspect that my spline streets are causing this and I’ve to admit that even my world composition view looks unclean in some places now that I’ve looked into it more closely.
The best way then is to set the level bounds manually. You can even remove them completely and place new ones from the menu, where you get your meshes, lights etc.
Most people don’t even go for larger worlds and therefore they don’t encounter many of those glitches . If you “catch” a bug and can reproduce it then report it to Epic so they can have a look into it.