5.5.1 Import Breaks things AGAIN (still) - materials breaking importing animation

I’ve posted about the broken import issues recently with 5.5. Here’s new stuff with 5.5.1

I have a SK with 2 materials. A stock model that I rigged for simple movements.
Here she is.

I go to import a new animation for this rig. Telling it to import the animations only

In the preview it seems to confirm this – no materials or textures importing

After import, it OVERWRITES the old materials! (No, it’s not creating new ones)

I have to go down and uncheck the import materials, and import textures for it to work properly. Even then I’m not totally sure it will not break things every time as it’s hard for me to test.