Sh. and D. have the same problem - they keep coming out/up with questions long after anyone with half a brain has already caught on.

Sh. and D. have the same problem - they keep grilling candidates with questions long after anyone with half a brain has already caught on.

Sh. and D. have the same problem - they continue to harp on the same subject and ask questions that for sharper/quicker minds have long since been answered.

Sh. and D. have the same problem - they keep asking questions long after sharper/quicker minds have already caught on.