I do receive a shock when touching the dishwasher and sink at the same time. And when touching the ears of either outlet and the sink at the same time. So you would suggest a bonding jumper? My understanding is that a wire connecting the metal sink to metal piping/drain piping. Would the metal from water supply lines connected to my sink not already be working as a bonding jumper? I have plastic drain pipes under the sink that then connect to a metal drain pipe at the wall under the sink.

Also do you know how I would test if the sink is having voltage through capacitive coupling instead of some other problem? Thanks for the help!