Magnet links are working. I just tried opening it in Chromium snap and I got the "xdg-open" prompt and than a window with selection between qBittorrent and Transmission. I selected qBittorrent and it opened the magnet link.
$ snap version snap 2.45 snapd 2.45 series 16 ubuntu 20.04 kernel 5.7.0-xanmod1 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1776873 Title: Whitelisted allowedURLschemes breaks some desktop apps To manage notifications about this bug go to: https://bugs.launchpad.net/snapd/+bug/1776873/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs