Cant move after CC/Taunt
This has been reported enough that it’s no doubt on their internal bug tracker. However, there has been no public communication about this. No idea if a fix is incoming, and if a fix is incoming, when.
Basically, always be ready to type /no (the “no” emote is faster to type than dance!).
Happens quite a bit lately, Were you standing on uneven terrain or did you jump down terrrain or up it?
Just checked https://forum-en.gw2archive.eu/external?l=http%3A%2F%2Fhelp.guildwars2.com%2Fentries%2F98802888 and it is a known issue it is in the verifying stage.