Browns o line or Bengals D line

[MileHighGrowler]

I'm wondering what's up with the defense the last couple of weeks. Lou looked like an absolute star with his plan against Baltimore, but the defense has not looked good since. It was like he planned for that one game and that was all he'd prepped for. Missed tackles, lack of pressure, giving up the middle. I haven't had a chance to look closely to see if this is a line issue or a breakdown somewhere else. But it's an interesting question, especially looking at the effort on the line every play until the whistle just a few weeks ago.