Thanks again for responding, even tho’ I have a work-around now.
FYI direct routing is how Cubase12 adds selected tracks to a new group. The problem started when I simply wanted to add a new track to an existing group and found no intuitive command option i.e. no right-click option to add to an existing group. Steinberg help offered nothing useful to an “add new track to existing group” search. A search of forum help returned an answer to someone else who asked the same question: they were told to use “Direct Routing.” So to add a new instrument track to an existing group I set Direct Routing to the existing group. If there is a “better” way I’m all ears. “Send 0dB” would make the same connection.
This project is an orchestral template, my first time using groups. BTW I used the Cubase “Save MixConsole snapshot” button and have no idea where it saved the snapshot. Typical. Anyway attached is my mix console showing 5 groups and a reverb track. Most of the instrument tracks are off the left side but they are all identical. Reverb and Strings have their own reverb instantiation, the other 4 groups send to the reverb track.
All the tracks work in the snapshot. As I said before to break any track’s audio route all I have to do is bring up the Channel Settings dialog and change the Direct Routing to Stereo Out or any other group. Try changing it back to the original group–no go. Nothing else changes visibly in the Mix Console: the track audio meter still indicates audio activity but nothing makes in to the group. Once the track’s audio goes silent you can’t bring it back unless you (like I said before) delete the track and re-enter it then add it to the group.
And just for the hell of it I enabled “direct routing summing mode” whatever that is and it has no effect.
Still looks like a bona fide defect to me but I’m always open to Greater Cubase Wisdom.

