Inverted Texture when applied in Blueprints

Dear all,

I could need your help.

I have a Blueprint Class, where I apply materials to an Object. But for some reason the texture is always inverted (see images). It doesn’t matter if I apply the Material within the Blueprint Editor by hand or using the event graph. Within the Blueprint Editor everything is fine, but when I switch back to my level the texture are inverted.

This is how i looks like in the Blueprinteditor

This is how it looks like in the Level

Has anyone an idea, why this is happening?