More info on speedhack bug: If you use a movement skill, like greatsword 3, hammer 2, on guardian, the speedhack "turns off" even though the button on UI is checked. You then have to uncheck and recheck it. Same with swiftness, after you get swiftness, you will lose speedhack after swiftness ends.
In addition, the hotkey for speedhack doesnt' seem to be functioning