Lightbaking not immediately visible on imported .glb

When baking lightmaps for an imported .glb they won’t get displayed:

As it is a .glb imported by the UnityGLTF Package the shader for the object is a UnityGLTF/PBRGraph Shader.

Under “Advanced Settings” one can see that Global Illumination is enabled (way down the image):

If i switch to URP/Lit Shader the Lightmap will be displayed:

Now the funky part: If i switch to the UnityGLTF/PBRGraph Shader the lightmap is displayed:

So yeah. I wonder what’s going on here and why the lightmap is not shown in the first place. Any experiences?

Just by changing the material momentarily, then changing it back, the lightmaps suddenly appear? Strange, definitely sounds like a bug. And seems the repro is fairly small as well. Could you submit a bug report with the built-in reporter, with your project attached?

I have uploaded the Scene to this github Issue. Does that suffice? Otherwise i will get into reporting from unity.
Many thanks for your answer!

I submitted a report. Let’s see.