Interactive water is broken in Unreal Engine 5.4 and World Partition

I have a map that uses World Partition and on which I added some rivers (transformed into blueprint) and lakes (default). Specifically, I used the water plugin from Unreal. To make the water interactive I added BP Fluid Sim to the character because I have different z’s and I set BP Dynamic Force SkelMesh.
However, I encounter a bug from the Unreal 5.3 version that persists even now in Unreal 5.4, namely after the partition on which the character appears when the game starts is unloaded and then loaded (I walked with the character on the map) the water is no longer there interactive but only at the lakes, the rivers that are the blueprint are not affected. Specifically, this happens in the packaged project.

Below I made a video of how I made interactive water so you can understand what I meant above.
I tried to convert the lakes in the blueprint as well, but the water material is missing after I do this.

Does anyone have any idea why this is happening and how I can fix this?

Thank you!