Dorico 4 mixer oddness

Dorico
9

Hi, I can repeat it on both my Win 11 workstation and laptop like this:

  1. Create a new project from template, e.g., solo piano. Enter some notes.
  2. I’m using the HSSE + HSO playback template. The template loads the Halion Sonic SE VST. Playback is fine, as is the send to rev.
  3. In the VST rack, load any other VST in the slot where HSSE was.
  4. In the VST rack, load Halion Sonic SE again. Doing this resets the sends, so you have to re-enable the FX radio button and give it a send value.
  5. HSSE is no longer sending anything to FX. If you turn on Dorico beep, and give it a send value, that works.