The Idea Pad on progression 2 will not generate anything. I have triggered the Idea Pad on the other 2 rows and material was generated, including the third row where there were no chords.
Once I deleted several chords from the 3d row, the Idea Pad no longer functioned either.
I did trigger a 4th progression and, after multiple deletes, it still generated new ideas.
After playing around with multiple other ideas on this page and dragging and dropping to and from the Main Track, the Idea Pad in Progression 2 did generate an Idea.

