Reply to apc40 fader problem

so i was playing a little gig the other evening and one of the faders on my apc 40 started to move on its own within ableton. fader 3 is mapped to the volume on channel 3 so when i moved it up or down it would follow but then when i stopped moving it it would jump around on its own for a little.

i had this issue when i first bought my apc 40, something was wrong with the power cable and it would do that so when i bought a new one it stopped. could it be the power cable is failing again or is the fader starting to break?