Got it. This is when your foreskin is not stretching at the pace of your penile length gains. I remembered that in the past a few brothers suffered this. When you strapped the plates on, and as you do your moderate level pull, pay attention on how much skin is moving. If there's not a whole lot of skin moving as you stretch, your tunica length gains is more than your foreskin allowed to stretch. This is the rug burn effect. Try to initiate the ball stretching as well to add extra foreskin to your total length.
Ball and lig stretch. That's the only way. Other than that, strap the plates over the area where the skin feels like it's over stretching, and perform a 5 to 10 minutes foreskin stretching exercise using light to moderate traction tension. Man, this brings back so much memory of the foreskin issues.