(I was instructed by a GM on the ticket I opened to post this bug report here.)
After doing the free character transfer from the classic hardcore server Doomhowl to Dreamscythe all my completed quests were reset to available so I can essentially do them all over again.
This is annoying because now I don’t remember what I’ve completed and what I need to do.
Extra info: it was a level 24 Tauren shaman. After the transfer to Dreamscythe was done, it got flagged for a name change because it was already taken so I did change it. Maybe this somehow messed with the quest registry?
Anyway, I hope this gets resolved at some point. Thanks for your attention.