Your starter map is pre-loaded in the editor. When you switch maps it has to be loaded. Read from drive, loaded to memory and each actor instantiated, materials compiled.
When meshes are loaded from drive the collision is one of the last things you get. LoD’s are loaded in reverse order 3, 2, 1, 0.
There’s 3 ways to deal with this.
- Edit the Game modes default behavior so that it doesn’t auto spawn a pawn and possess it immediately on join.
- Disable movement in the character by default and spawn above ground.
- Use a loading pawn as the default pawn and have it tell the controller when it the level is loaded.
I use #3 Replication or Loading Problem? - #17 by Rev0verDrive