The electrode at grudge grotto can glitch out on the player character where it doesn’t show the buff but the animation and the sound just gets stuck on repeat.
I absent-mindedly flew through the field when I was exploring the area and only noticed a little bit later that I was making a zapping sound.
after retracing my steps and trying to reload and doing all sorts of stuff I found the electrode at grudge grotto and I stood in it until my stacks went up and when it discharged the glitch went away.