So I don't have much input other than I know two lines as such if they are less than 1/4" from each other or and running parallel with the lead/tail edge, this CAN be an issue.
So myself, I have only found this to occur with gloss and synthetics. Also generally tords the tail of the sheet and also have noticed it with tick marks on some stock as well. I have cut voltage to to black as well as made the lines straight K if I noticed them being a build such as rich black. This generally fixes the issue.