I can edit the profiles just fine and new instances have the new materials but existing instances are not updating. I have tried everything I can think of, dragging copies, copy/paste, merge into new file and various tricks with modules and attribute manager.
The other odd bit is that somehow the existing, intransigent ones changed from a standard gray paint material to asphalt seemingly spontaneously. This is when I noticed the problem. Of course the only way I could figure out which material it changed to was to look up close and delete the matching one to confirm.
Has anyone else run into this?