Something's wrong. We just plain don't cover well. If it's players, coaches, or the design of the defense, it doesn't matter. Ultimately it's the coaches that need to correct the problem, and insure they have the right personnel on the field to do the job.
I'd guess this problem really belongs on the shoulders of the coaches, but as we've seen in the past, it is all dumped back on the players, and called "failure to execute." But, it doesn't matter. One of the two has to go, if they can't play together, without problems.