There have been a few mentions over the last couple of weeks, and it has a GitHub issue logged if you have anything you want to add there. It is kind of a bummer that I can't go browsing other instances in Sync, but at least there are other ways to do that
It's because Lemmy has upgraded in this developer has done nothing to upgrade the app in the meantime. And everything is breaking more and more. I've actually had to completely stop using this app because it's so annoying to use right now