Cinemachine weird lines of color when moving?

I installed Cinemachine to have a camera move with my player in a 2d platformer I’m making, but now for some reason when my camera is a specific Y-positions, these strange lines of color appear in the game view, on what appears to be tile chunk borders.


![171739-cinemachine-weird-line-thing.png|514x274](upload://jHIv8BHRAcl2FxeKmW9iLl0y4Ku.png)
Is there a way to fix this aside from making the camera snap to a Y-position(s)? I'd like to avoid this solution because I want to be able to A: have a smoothly-moving camera, and B: make a game with some more vertical levels.

Thanks.

update: well, it’s gone now. I literally don’t know what fixed it, it’s just gone.