Not sure if you mean that the Qcon follows Cubase, because that’s not happening.
I have a Qcon Pro-X + 1 extender. If I look at channels 1 to 16 on my controllers then select track 24, the Qcon will not “follow”. I don’t mind, cause that would screw up my workflow/how I set up my sessions and such.
Have this setup for 2,5 years now, haven’t had any issues. Heard people having issues of it loosing connection after a while, but I’m not working on it 8 hours a day. Did happen once, I left the room for a few hours, got back and had to reset it under Studio setup. Not a big issue to me, but I guess it can be annoying if you need to do that every few hours??