Model Importer multi-editing fails when model scale differs

Repro:
- have a project with 2 humanoid meshes of different scales
- select both, try to change Mesh Optimization to some common value
- notice hitting Apply doesn't work!
- individually, set scale on both assets to 1
- retry, notice that it works now!

NOTE: It might be related to one of the assets being a Blender file, while the other is FBX - with two FBX meshes i can't reproduce it with the above steps.