This issue has been reported by many guild members and confirmed by myself and random zone chat participants.
The Sorcerer ultimate Overload (and morphs) is currently bugged, and will lock into a heavy attack when attempting to use successive light attacks.
This appears to be animation related, and locks you into a heavy attack draining your ultimate when you are 1) hit by any damaging ability or 2) are effected by any animation-related mechanic (stagger, etc.).
Please ZOS, do not test this by just standing 40 yards away and spamming some light Overload attacks. You must get up in your enemy's face and get hit a few times, and you will see that you are locked in a heavy attack and rapidly draining all your ultimate!
The only way I have found to break this bug is block cancelling the heavy attack. Weapon swapping will not work while the ability is bugged. If you are like me and use Lightning Form (whichever morph) it can be very difficult with all the other particle effects happening in a group to notice you are bugged before your precious ultimate is drained and your DPS completely ruined.
I consider this a critical bug and hopefully we can get some dev attention on this ASAP!
@ZOS_GinaBruno
Edited by Phinix1 on November 19, 2015 6:17PM