Like 25% of the time when activating overload, your LAs wont fire..at all. If they do, its often a question of time, seconds, before LA stop working again, mostly after wepswapping while overload is active. And everytime you HA overload and you're still in the animation and you run out of ultimate, you are stuck with the movement speed you had while HAing.
To fix the LA problem you have to deactivate and reactivate overload and to fix the movement bug after HA you have to get more ultimate and HA and stop before you run out of ultimate. Extremely annoying bug(s) to keep dealing with as a magsorc.