I have an American Standard 2014 Precision bass. I’m having a problem of an unwanted oscillation by depressing the 5th fret of the D string and then playing it along with the A string. The pickups aren’t too high and I just put brand new strings on it today to see it that would help. It didn’t. I hear it through a Fender Rumble 100 and to a lesser degree with a Vox headphone amplifier. Does is it sound like I need a setup?