Hello everyone,
I have the following problem with a solid (possible bug) (see screenshots) (minimal example included)
FME-Version: 2026.1.1.0 (20260415 - Build 26121 - WIN64)
I have a digital elevation model.
I extrude the model.
I slice the resulting solid at a fixed Z-value.
I pick the part under the slicing plane.
Up until here a GemoetryValidator does not find any issues ✅
Next step is to dissolve the solid and after this the GemoetryValidator does find 3 issues ❌
(Self-Intersections in 2D, Invalid Solid Boundaries, Incorrect Solid Orientation)
The issue only occurs at a very specific slicing level. Slicing the solid + - 0.000001 m above or below does not cause an issue. Removing the issue locations before dissolving also prevents the issues from appearing.
Does anyone have an idea what could cause these issues?
Many thanks in advance.
Minimal example to demonstrate the problem:

Configuration of the GeometryValidators:


