Stereo Layer displays missing texture in 4.23

Hey there, I am trying to implement stereo layers into my project and even though the layer itself is displayed, it only shows the generic texture ue4 displays if none is selected :(

I encountered this on Oculus Go and Oculus Quest, doesnt matter if the texture is simply a picture or a media texture :/

I am Using UE4 4.23. I just created a test project with 4.22, there this problem doesn´t exist.