I had this exact thing happen in Duolingo. I remember being annoyed, because in school I had learned to say “comment t’appelles-tu” but Duolingo taught me “comment tu t’appelles.” Then it seemingly randomly switched back to the original one I knew, like I should have been using that the whole time.
What happened I think, is we left the “s” off of the end, so Duolingo marked it as wrong, but rather than add the “s”, it gave a different correction (the more proper way to say it). If you had put the “s” on the end, it would have been accepted as correct.
A Starstruck Odyssey is my favorite season. If you like sci-fi I’d highly recommend it! Neverafter is also very good, a very dark take on fairy tales. The Seven is a riot and is a girl-powered spinoff of Fantasy High.
Fey & Flowers is great though. If that’s what you watch next I’d say go for it! Personally I wasn’t a fan of Tiny Heist or Shriek Week but every other season is fantastic.