Why won't my interactive materials change?

I have made a blueprint that allows the player of the level to switch the material of the counter tops (I work in arch viz). For some reason certain materials won’t show up when switching through them in play mode. It’s still switching to them in the blueprint but the counter tops go to default white color rather than the material. When I replaced them all with a simple set of materials that had no textures and only different colors, it worked, but it won’t work with more complex materials. Why is this happening?

It looks ok. Can you drop these materials onto the counter ( will they apply in editor mode )?