How do I set WaterBodyLake invisible when level is unloaded in word composition?

[redgiantstar.com]

After many tests, water interaction will not work stably. After pakaging, even interaction that works in the editor, do not always work. So I moved WaterBodyLake to the main level. World composition unload and load the level and water interaction work. But I need to make invisible WaterBodyLake because it turn upside down now… See picture. (The LOD level has a water plane and it looks the same as WaterBodyLake).

Question: how do I set WaterBodyLake invisible when level is unloaded in word composition? That might bring the solution I think…

Info for those who are interested in Water Plugin:

It’s experimental and I couldn’t get the demo scenes to work first. But the water looks good, so little by little I got it running.
Activate plugin, restart and bring to level.
Afect terain: deactivate.
If water is not visible, make it bigger.
Waves, adjust depth.
Interactive:
Bring BP_FluidSim_01 into the level.
Solver: Ripple solver.
Terrain Mode: Constant Water depth
Only works if Z0. Solve like this, see picture.
Important: First get it running, backup and then optimize and adjust…

[redgiantstar.com]

I have solved it this way, but I have not considered the performance aspect. Anyway, it works: WaterBodyLake will be hidden, and when the level is reloaded, WaterBodyLake is visible again. And the interaction works. Maybe, someone knows a better method so that the computer performance is not affected much?

[redgiantstar.com]

A timeline is not even necessary…