Deflector high pitched tone in bypass

Hi folks. I built a Deflector and noticed that even if its bypassed it puts out a high pitched tone which is audible through the amp. This seems to be occurring when the density knob is left of 12 oclock and it is much less noticeable turned right of 12 oclock. Has anyone had this problem? My fv1 was presoldered on the board.
 
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Tried multiple amps, multiple power outlets in the house, multiple power supplies, multiple guitars. The shrill tone is always there when density is left of noon. This is when the pedal is bypassed (off).
 
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