Bug? Pad stuck.

The E3 pad on instrument page 4 has become stuck while working on a custom kit. Nothing I’ve done has been able to un-stick the pad and it’s constantly triggering. As far as I can see from the documentation/google, there’s no function for continuously auto-auditioning a pad.

The actual triggering is visualized with the usual white circle on the pad, and of course there’s playback of any assigned instrument.
The triggering does not record into a pattern the way manual triggering does (even when an instrument is assigned to the pad)

The issue…

  • started happening while tweaking a delay effect in the GA mixer
  • does not occur with other kits.
  • happens on a new track in a new default, empty project
  • happens when the pad is cleared
  • happens with all MIDI disabled and even physically disconnecting all MIDI devices)
  • happens after reboot

Link to kit sans samples:

Software environment:

  • Windows 10 64bit
  • Cubase 9.0.10 Build 150 64bit
  • Groove Agent 64bit

I’m going slightly mad. Any help?