that's weird. it's actually a pretty useful feature, but it's odd they'd add it to old reddit before new reddit, considering it's basically deprecated. maybe it's just an a/b rollout and i don't have it yet
i have old.reddit as default as well, but i'm not logged in on my phone browser and it wouldn't open in my app
just fyi, your link is broken for me
i wonder if it's a new url scheme, as i've never seen
duplicates
in a reddit url before, and if i switch it out forcomments
it works fine