Reimporting an asset after making changes causes loss of saved LOD changes when editing a static mesh.
Similar issue was logged and fixed for SkeletalMeshes but this issue is still occurring for Static Meshes:
[Link Removed]
Expected: The color of the cube remains lime after reimport
Result: The color of the cube changes to cyan after reimport
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-59611 in the post.