I recently bought a Fender Deluxe Active Jazz Bass V5 made in Mexico and it sound really good. the only problem is that when I have the bass volume turned up a little before half and I take my hand off the strings I get a loud buzzing noise. At first I thought it was my cable, but I tried with my other bass and didn't get the sound. Someone once told me this was caused by a grounding issue with fender guitars. Does anyone know how to fix this?

Music - Fender - Deluxe Active Jazz Bass Electric Bass Guitar