[Lovely]

This seems to be an issue with other CC spells as well.

Basically when you get messed for example it says

You are stunned! (In white text)
You are mesmerized. (In blue text)

When the buff wear out you get

You are unstunned. (white text) and the debuff goes away.

But for some reason the server never update the blue text message which would be

"You are no longer mesmerized"

So the server think you're still mezzed and therefor can't use any abilities/spells. You can however run away freely.