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 - LD & Modeling - Terrain - Landscape |
|---|---|
| Target Fix | 5.5 |
| Created | May 21, 2024 |
|---|---|
| Resolved | Jun 17, 2024 |
| Updated | Aug 15, 2024 |