JACKSONVILLE, Fla. — JACKSONVILLE, Fla. (AP) — Kansas City won’t have to dig deep to figure out where things were awry in Jacksonville on Monday night.Patrick Mahomes had an interception returned 99 yards for a touchdown and the Chiefs were flagged 13 times for 109 yards in a 31-28 loss to the Jaguars. Four of those penalties came in the final 1:45.The mounting mistakes proved to be the difference in a back-and-forth game, the fifth one of the NFL’s Week 5 decided in the final 30 seconds.“Whether I agree with them or don’t agree with them, it doesn’t matter,” Chiefs coach Andy Reid said. “They called them. And so you have that many penalties, you give up field position. You can out stat them to death, but it doesn’t matter. It’s the score that matters, and we’ve got to take care of business there.”Mahomes did that for most of the night — until he made one critical mistake.He looked like he was about to put the Chiefs (2-3) ahead 21-14 late in the third quarter. But linebacker Devin Lloyd stepped in front of Mahomes’ pass intended for JuJu Smith-Schuster at the goal line and took off the other way for his league-leading fifth takeaway of the season.“They showed blitz, Pat didn’t see him and it ended up an interception,” Reid said.Lloyd juked Mahomes and Hunt, then got up to full speed along the Jaguars’ sideline. He picked up a block from Josh Hines-Allen and then held the ball tight as Tyquan Thornton tried to knock it loose at the 5-yard line.It was the longest interception return by a linebacker in the regular season in NFL history, and the 14-point swing prove …