Drum map, can't edit in score

I want to be able to correlate the drum editor with the drum map to adjust the score, but ‘edit in score’ is grayed out and can’t be selected. Why?
I can’t send a picture with snipping tool because the floating window disappears when I choose the tool.

Same problem detected today. Cubase 13. How do we solve it? Tell me it’s not a bug that needs fixing.

attached to the previous post