Since bug #1748581 was fixed the dist-upgrader is only changing the channel if the currently set matches the release used, unsure how you got stucked on stable/ubuntu-19.04 but that explain why it wouldn't change it now. Did you upgrade use apt or some other way back then?
Doing a new 21.10 insllation and upgrading correctly result in the channel to be updated so it seems likely the issue impact users which for some reason are using a channel not matching the release they are using -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1971987 Title: On release upgrade, Snaps don't change channel To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1971987/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
