Polyphonic step editor input yields incorrect behaviour

[izzyreal]

1. Press 2 pads while in step editor.
2. Observe that the metronome starts playing while you hold the pads.
3. Release one of the pads.
4. Observe that the metronome stops playing. The metronome should keep playing.
5. Release the other pad.
6. Observe that the duration recorded for that pad is 1. It should have the correct duration.

[izzyreal]

Wrong project.