I have a lot of confidence in Lumin and Peter’s commitment to fixing issues when they arise - assuming our issues are the same (and I’m not totally convinced), I am fairly confident that if it were fixable @wklie would have already done so. Would be delighted to be proved wrong though!
True, the presence of Peter and his responsiveness here was also one of the considerations choosing for Lumin. Shows that they care. As mentioned is not a huge issue, since only approx 300 DSD albums are in my library and after that click they sound great, so I am happy with my D2. Just hope that down the road there will be a solution.
Flagging support was just helping from my side. Maybe they see something that saves time or helps, that is why I offered that.
Peter. Are you saying that the relay could cause that click? The click is exactly as you confirm in the thread of dhusky. Coming from the speaker and yes it is not loud, but I have bat ears 
FWIW, you might need bat ears over speakers but by headphones it is very obvious…I probably wouldn’t be that fussed otherwise.
could be related to output stage design.
when relay is triggered this cause short DC pulse on output?