hantek cc65 current probe D.C offset

[R_G_B_]

I was testing the Hantek CC65 and found that  it produces distorted asymmetric waveforms. However increasing the D.C offset voltage from the function generator corrects this. I'm suspecting the hall effects sensors are better suited to D.C rather than A.C. current hence this effect? I will have to check this  by increasing in current to see if this effect is because I was using approximatly 30ma current draw.