I commented out that ‘if’ condition in PostRegisterAllComponents(), but the landscape proxies still don’t unload after adding a water body. Is anything else needs to be done? Using 5.5.2 src build.
Here’s how I fixed it for myself in UE5.5:
NOTE: I would only try this with a new project. This bug caused me to lose any saved data regarding any sculpting done to the landscape. Start manipulating your landscape AFTER trying this… (if you do this to an existing landscape, it may flatten out as you edit. Rebuild your HLODS in World Partition to get rid of artifacts)
First make sure you don’t have any selected regions “loaded” in World Partition.
Select your Landscape > go to Details > scroll down to Landscape > Enable Edit Layers (Untick / change to False).
Then go to World Settings > World Partition Setup > Enable Streaming (Untick / change to False).
Save and Restart the editor.
Change both options as mentioned above back to True by ticking them.
This may have to be repeated when editing the landscape, but hopefully Epic fixes this one day soon.
I lost a lot of work because of this. I wasn’t able to open a saved map without crashing the engine, forcing me to start from scratch again. Extremely frustrating!