Changing Static Mesh for a mesh with overridden materials should NOT reset materials

Sometime recently, the behavior of changing a static mesh changed.

A very common operation is to want to change a mesh, while keeping material
override.

Here I have a sky mesh, and the material is overriden (yellow arrow)

[image: Inline image 1]

It is expected that I should be able to change the sky mesh without the
material getting nuked, but if you change the mesh, it resets the material
to use the material of the new mesh in the content browser. This is very
unwanted behavior since you then have to go hunt for the material in the
content browser.

Expected: changing a static mesh assignment keeps existing material
overrides.

see description