Line Appearing on Video Overlay Animation

[isabellet61852572]

I created a relatively simple animation using an adobe template, followed guidlines on a tutorial for cropping etc, but on a few of these clips I'm seeing a line appear at the right of the crop, it's small but is quite jarring because as the animation plays it gets slightly bigger/smaller. 

Any advice on what I could be doing wrong? I attached screenshots w my effect controls panel for reference. 

P.S. it still happens when the clip is rendered.

[Peru Bob]

[isabellet61852572]

Apologies! Have never posted a question on here so didn't know the proper format. 

[Peru Bob]

Apologies! Have never posted a question on here so didn't know the proper format. 

It's not you.  The forum is not very clear about posting images.

I don't see the line.  Can you circle it or place an arrow?