Hi, do you have any global fx enabled on those tracks? I’m not sure it would do what you’re experiencing, but maybe something on the fx track is impacting the sound? If you do have something on there which might be influencing both, maybe listen to it completely dry and see if that behavior goes away.
It’s a strange one, I don’t know what to think tbh because I don’t think a neighbor condition should be involved between 6 and 11 so I’m not seeing too much of a correllation between those 2 tracks.
Anyways, good luck! When all else fails, contact elektron support!
edit: If this turns out to be a bug, you should also report it in the digitone II bugs thread, just to add to the available knowledge.