I would say yes, if we see it persist in the next few games then there is only so long we can ride our luck for. I thought we gave up a lot of soft 3rd down conversions on Sunday and that was a factor in the TOP numbers, that's got to be cleaned up. The positive thing though as others pointed out, despite all the possesion the Cheats had, all the yardage they gained, we gave up just one TD and a few FGs, to sum up 16 total points. That would suggest we got our red zone D right, which is the most important thing. Keep your opponents to that number of points each week and you will win more than you lose.
The D is a work in progress, just like the rest of the team, no point in peaking in September tbh.