I think people forget because the press avoids recounting the events of "the Battle of the Bridge©". The conventional narrative is "Spurs lost their rag", but in truth, Chelsea spent 90 minutes trying to goad and cheap shot their way to victory. And Fabregas was a major instigator of the game ending brawl by dick punching Pochettino's staff on his way by, along with some choice Spanish remarks.
Lamela, unlike Vorm, didn't back down and chased Fabregas down the tunnel, trying to take on the entire Chelsea squad. Coco doesn't forget, nor does he forgive.