It appears that painted Weightmaps have inconsistent mappings between Nanite and regular landscape, BUT only if those landscapes are created in a World Partition level, landscape in regular levels don't have these problems.
See linked bug for repro instructions.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-215517 in the post.
| 0 |
| Component | UE - Graphics Tools - Terrain - Landscape |
|---|---|
| Target Fix | 5.5 |
| Fix Commit | 34577005 |
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| Created | May 21, 2024 |
|---|---|
| Resolved | Sep 12, 2024 |
| Updated | Oct 10, 2024 |