World composition/standalone player falls

Hello,

Due to memory and performance problems I switched to world composition mode and created 4x4 tiles for my world with Landscape/Manage/Move To Level tool. Everything fine except one thing, if I run standalone version, the player falls probably due to late streaming of that tile. In editor mode, it works perfectly - probably because of I Load the tiles in the editor and they are in memory. Can I set a default/initially loaded tile for world composition? Or I need to move the tile where the player starts to the persisent level? I use auto-spawn with player start actor, should I choose manual spawning and checking if that tile is loaded?

thanks