UMG Background Blur black in blueprints

If I attach a UMG Widget including a Background Blur Widget to a blueprint it renders black.

Why is that?

Steps to reproduce:

  1. Create an UMG widget
  2. Add a background blur widget
  3. Create an empty blueprint
  4. Add a “Widget” to it.
  5. Select your UMG widget as the class

Maybe the Canvas Panel has a color filling?

No, it doesn’t

running into the same problem here. Did you find the solution?

running into the same problem here.
Did you find the solution?

It’s not supported: