GL_UNIFORM_BLOCK always unbound in Nsight

Hi,
When using the Api Inspector -> Program tab I can see my uniform block, that is defined in the Shaders, listed in the Active Uniforms panel but the location says “Unbound” and there are no values listed. When stepping through the shader program the variables inside the block hold the correct values.
Is this a bug or am I doing something wrong?

Best
Christoph Pacher