Well, half a year have passed, and just as I expected (Yep, I'm a pessimist) my second ring unglued. And third is on the way. I missed deadline for voucher and didn't get replacement for the first one (Well, okay, in the end it was my fault). I'm totally okay with repairing it myself, i just don't want to damage inlay with glue. That's why I want to question once more: What glue can I use to glue inlay back?
Second on foreground, first on backbround

has difficulty triggering a read except in one very specific spot for each ring

Does it apply to 2016 2015 models, or only for original ones?

So this day has come. One inlay unglued, and the other is on the way. Yep, I know I can send it for replacement, but it will take time and money. So I thought "Maybe I can just glue it back": it will be faster, and because I possess more then one ring, I will be able to repair them anytime and anywhere. So my question is, what glue should I use so it won't damage inlay and will stick good to the rind surface (2016 model)?
Sad images