Landscape Smoothing becomes jagged/ruined every time I save

Development World Creation
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1

Hi,

Every time I save my landscape after smoothing it, it becomes wrinkled/jagged. It’s impossible to make any progress this way. The photo is below. Is this a bug? I’m using 5.3.

After_Saving_Landscape_Jagged
After_Saving_Landscape_Jagged1073×626 110 KB

Thanks,

Aidan