The Bengals offensive line had its worst game as a unit during last week's comeback win over the Seahawks.
That line gave up four sacks against a Seahawks defense that hadn't been particularly great at getting to opponents' quarterbacks (they had 6 sacks through first 4 games). That was also double the amount Cincinnati had given up over the first four games combined.
Whatever the issue was, they hopefully got it fixed in practice this week. They'll face one of the best defenses and coaches when it comes to rushing the passer this week in Buffalo.