I'm on an R2, but I don't think it's related to the hardware. I can't even back up my configs on an R2. 3.0.205 is what I'm on. Take screenshots is the recommendation... https://www.google.com/search?q=Uncaught+Unmatched+Device+duma+site:forum.netduma.com
I didn't dig too deep, and most of these look like netgear, but I'd imagine that's just because they probably have larger market share. I pinged your CEO and CTO only because they're the only leaders I could find on linkedin. Lets hope anything comes out of that, I'm just so over this product sometimes.