DETROIT — The Pistons’ struggles in the fourth quarter continued for a second straight game. After going the first 11-plus minutes in Friday’s loss to the Boston Celtics, their issues came on the defensive end, where they couldn’t slow the Los Angeles Clippers. The Pistons built an 18-point lead in the second quarter, but the Clippers got a big hand from their three former Pistons in mounting their comeback in a 106-102 victory Sunday. Marcus Morris Sr., Luke Kennard and Reggie Jackson keyed the comeback, pulling ahead with a big fourth quarter, including Kennard scoring 11 of his 16 points in…