It seems that something in the block instance component is currently broken.
Baking with a shortcut creates the layer ‘panel’ which I specified and an empty block defintion.
Baking with the bake component creates the layer I specified and a layer named ‘Grasshopper’.
When I click ‘bake’ a second time, the empty block definitions are deleted.
block_bake_problem.gh (26.2 KB)