When I try to make a stave remain without sound, Dorico automatically assigns it a sound.
The NotePerformer playback template is selected. Then, I add other VST Instruments. One of the staves should not play, so I assign it the ‘–’ sound generator in Play.
If I make some changes with other assignments (adding instruments, assigning VSTis), the staff that was assigned the ‘–’ sound generator is automatically set to NotePerformer. I’ve not reselected the playback template.