5.4 Extremely long load & save time for nanite landscape

Hi,

Recently switched over from 5.3 to 5.4 and now that landscape nanite is actually working without z-data issues. However the load time and save time in editor, and load time of landscape streaming proxies in game are so long it’s not workable. It still makes me want to turn off nanite and forget it exists on landscapes.

I have 32x32 LandscapeStreamingProxies, below the stats of the proxies, material and my PC. It takes about 20 seconds to load a new streaming proxy from the world composition grid while walking around.

Has anyone found a work-around for this? Or am I doing something obviously wrong? Thanks for any feedback.

Proxy stats