@George,
I think that it’s a combination of two things. One is coach Reid insistence on using the pass instead of using the run a greater percentage of the time. You can’t blame him considering who his QB is and how successful he has been.
Their Defense and tackling is way off, too.
The other is Mahoney has not protected the ball well enough. Also, Mahomes has been playing “hero ball’ way too much. He tries to force the issue at critical times and put the ball in too narrow a window. It worked before but clearly not working now. He’s off a bit in accuracy based on watching last night’s game using the eye-test.