Reported in UDN: [Link Removed]
Reimporting a static mesh asset from an FBX file causes collision to disappear on spline meshes referencing the static mesh asset.
In investigating this in 4.27, I noticed that USplineMeshComponent::RecreateCollision() gets called twice during the FBX reimport process. And later in FKAggregateGeom::GetAggGeom() and FKConvexElem::DrawElemWire() although the ConvexElem appears to have the correct values, the underlying PhysX collision structure has been reset to default values. In 5.0, crash occurs within Chaos source.
Steps to Reproduce:
Crash occurs upon reimport.
The collision box is updated to represent the collision for the spline mesh based on the reimported static mesh.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-134573 in the post.