Happens twice to me once yesterday as i respec realm with a stone purge has cone to no timer, i can cast it continuosly, after zoning the bug fixed and the right timer coes up. Today in frontier no zoning no others things i hit purge on error and noticed that the icon was still active and no timer again. i will try to contact a gm in game,BTW if i ca not succed or the timer went up again plz investigate.