I've had sporadic problems with lightning staff heavy attacks the whole time I've played the game. It's like they'd mostly fix it and then next patch it would break again. I have noticed I'm holding in the right trigger on my wireless Xbox 360 controler and the attack isn't locking into a target and doing anything at times. Sometimes it seems to work fine so I can't figure out why it breaks. I'll have to let go of the trigger and aim at a target and press it again and then maybe it will work. I'm also having sporadic issues where I try to use Wall of Elements and it's almost like the skill is stuck. I don't see the animation at all and the skill never fires. That is largely in the public dungeon in Blackreach (Western Skyrim) and there are lots of other problems there currently. The Dwarven Wolf mount lead hasn't dropped for me and I've killed 100+ bosses. I go to get another lead and it takes about 3-5 tries on average for all the rest. So many bugs right now. I'm surprised at how much update 27 broke in this game.