Encountered on: Stamsorc in CP Cyrodiil, PC EU, randomly every 20 minutes or so. Character twitches, start of skill animation shows very briefly, but nothing happens. Resources do not appear depleted. Then, when you bar swap, resources suddenly appear almost completely depleted. I mainly looked at my stamina, being a stamsorc, but this was affecting mag skills as well, such as Streak, Dark Deal and Crit Surge. Seemed to resolve itself after a minute or two only to happen again not too long after (every 20 mins on average). Was wearing Engine Guardian. Stamsorc unplayable.
PC EU: Magblade (PvP main), DK (PvE Tank), Sorc (PvP and PvE), Magden (PvE Healer), Magplar (PvP and PvE DD), Arcanist (PvE DD)
PC NA: Magblade (PvP and PvE every role)