UMG disappears at low alpha/opacity

Hello, I’m having an issue where UMG slots set to low alpha (under 0.34 specifically) disappear entirely.

Repro steps:

  1. Create a new Widget Blueprint, with an Image slot.
  2. Set the Image slot’s opacity/alpha to something below 0.34.
  3. Create an Actor Blueprint with a Widget component set to the above Blueprint. You won’t see the Widget.
  4. You can see the Widget appear in the viewport of the actor Blueprint by changing the Image slot alpha to something like 0.5 and recompiling the Widget Blueprint.

Originally I encountered this issue with textures and assumed it was a problem with my images, but in reproing for this question I found it happened without a texture.

Am I missing something or is this a bug?

Derp. My question brought up a related I hadn’t seen yet: