Guys, the defensive performance last night wasn't because KC was "sleepwalking". It's because NE's defense has got something going against KC. Last year, they played the Chiefs really well too. So to put it in context, here's how the Chiefs' offense has done against NE's defense the past two years...
2019
Chiefs (in Mahomes games against non-Pats opponents): 30 points, 388 yards
Chiefs vs. NE: 23 points, 346 yards
*NE held them to 7 points and 42 yards less than normal
2020
Chiefs (in games against non-Pats opponents): 30 points, 433 yards
Chiefs vs. NE: 19 points, 326 yards
*NE held them to 11 points and 107 yards less than normal
The Patriots have got something figured out against KC. Not that they've totally stopped them, but they do have the tools to slow KC down. This wasn't an aberration. Don't forget, in the AFCCG a couple of years ago, they shut KC out in the first half before Mahomes went crazy. So they're capable.