Cubase 15 issue: Massive X, no sound, kills project audio

When adding NI’s Massive X instrument to an existing project with working audio, and manually clicking on the instrument track, playing midi is received by Massive X but no sound comes from the instrument. Worse, after removing the instrument track, there is no longer any audio coming from the entire project even though the correct audio device is shown and was not changed. I have to quit Cubase and re-launch to get audio back.

Lots of bugs in this release. Not happy.