Most of the clipping issues seem to have been fixed in the latest repack, but there's still going to be the occasional issue with characters who've been made using WideSlider.
Might be worth checking the slider values on the jaw, chin and mouth area. If you've gone for big ol' blowjob lips, the sliders for the mouth area tends to work by extending the teeth downwards, which caused similar dick-clipping on a few of my models.
Try Setting the mouth to the ridiculously wide 'O' shape in the creation menu just to check how much of the face is folding or clipping, especially on the lower jaw and neck. Then adjust the sliders to make it look less freaky - you won't get it all the way due to the limitations of the game, but "filling" the neck and jawline out a little bit will at least mask, or fully resolve the issue. I found that it worked for me, at least
Hope this helps!