GPUImageVideoCamera geometry lines visible when view mostly offscreen

[MrBendel]

I'm having a kinda funny strange issue. I have a GPUImageVideoCamera in a paging collection view. When the camera is mostly off screen, for the last maybe 20 pixels, the camera starts to show geometry lines and the texture starts warping as if its being stretched towards the bottom of the screen.

Oddly enough, this anomaly can't be captured. If I connect my phone to quicktime, the lines disappear, and if I try to snapshot the phone by holding home and power, it doesn't capture the geometry lines.

I'm not sure what the issue is because the geometry of the camera isn't actually changing, just whats being displayed on screen. My guess is its not a GPUImage issue, I just thought I'd see if anyone had any ideas?

Thanks!