World Composition loading level

Hello,
I have a question about world composition. I am using it in my game in 4.26 and there is something really annoying.
When moving arround the world, my level load and unload normally. But on some tiles, there is cities…
When I am approaching a city tile and load it, the game freeze for some seconds. I am still quite far from the city so it could be done asynchronously without issue.

But I don’t find any way to switch it to an asynchronous loading.
I have seen that there is something to enable in the project settings “Async Loading Thread Enabled” but it doesn’t change anything (both in editor and in packaged game).

What should i do ?

Thank you for your help and your time :slight_smile:

All the best