World Partition: How to not load cells in runtime?

  • I unloaded a bunch of cells in the World Partition.
  • I want to make sure that those cells are also not loaded in runtime.

Problem:
When ever I run the level in runtime (game mode) all the unloaded cells are loaded.

Question:
How can I make sure, that unloaded cells will not be loaded in the game mode?

Thanks for any little help,
appreciate it!