Mouse Hover Animation blurry

I have a small bug. Who could help me?

I made a mouse animation: on hover state I want to turn a dot into a round border (see video). Now the problem is… when I hover it seems blurry. When zooming in and out it’s fixed. Probably something with scaling, but I still think it’s weird. Who knows what to do?

Here is my public share link: LINK
(how to access public share link)