INNER GROOVE DISTORTION

Seasons greetings! I have a VPI Prime Sig. with a Soundsmith " The Voice " cart. and am having an issue with inner groove distortion. I don't use anti-skating, just twisting the cable going to the junction box. I will be upgrading the arm to a Fatboy soon and when the tech comes to set it up we will address the issue. On some records I can't listen to the last song! Frustrating, any feedback will be appreciated. Also, have Pass XP-25, ARC Ref 3 and 75 with ML ESL11A's. Thanks.