Thin black line on sides of video

I can't seem to figure out as to why there are black lines on the sides of my videos on export. Hoping someone can help me out. I've attached some screenshots of my render settings as well as workspace.

Things i've tried/checked:

1. Scaling the layers past the composition window.
2. Video resolution is 960x540 and is being exported as ProRes not H.264.
3. No effects on layers other than opacity.
4. Comp background is white.
5. Added a white shape layer that extends beyond the composition window.

Any suggestions are welcome. Thanks!