GetMaterial returns material with blurred texture

I’ve made a blueprint which dynamically creates a row of small static boxes, each has it’s own unique material applied. Then I’ve added an OnClick event to those boxes to get a material reference and further apply it to another actor.

The problem is that the returned material has blurred textures. I think it’s because the initial boxes are very small (though their textures look pretty detailed and sharp) the material returned with kind of mip-maps. I’ve added huge objects to the scene with the same materials which were applied to the row of boxes - now the returned material has detailed textures. Even if the huge objects are hidden the solution works. But it doesn’t seem to me to be a good solution.

How can I get material with the highest mip-map textures in it? thnx