Cinemachine Confiner doesn't confine on the upper boundary

Hello,

I'm using Cinemachine for a top down 2d game and I'm having issues with the confiner extension. It appears to work fine on the left, right, and lower boundary but it doesn't confine the camera (screen edges or camera itself) when going up.

It almost seems like the extension was coded with 2d side scrollers in mind so it works to the sides and down but not when going up. Has anyone run into this issue before?

I've tried to confine the camera with a polygon collider 2d and a 3d box collider but both of them cause the same issue.

Thanks.