Not only do they disappear for stretches, and I have no stats to back this up, but it always feels like they give up a score when it's least ideal. What I mean, and it happened Monday night when GB had 1 and Goal from the 4 I think, and they couldn't punch in the TD. Once they made the FG, I just had this "Oh no" feeling that D was gonna allow the Raiders to march down the field and score. Not only did they score, they scored a TD which put them up for good. Again, no stats to back it up but it feels like it happens often in those types of situations.