How to get rid of white dotted line around paths/objects?

I'm new to Illustrator, so forgive me - this is likely an easy fix that I'm just not seeing!

I'm attempting to create a small logo for myself but whenever I create a new path or object (ellipse, rectangle, etc.) there is a white dotted line, almost like a separation between the item and the white background.

The 'Z' path was made with a pen tool and it looks worse, but you can see it between the fill and stroke of the ellipse behind it as well. Appreciate any help!