I did not understand that you actually intended the social icons to be only 1/4 of a circle — only 1/4 of the logo showing. This is not clear enough for my visitors. Would it be possible to substitute different icons that show the entire social media icon on the screen?
OK, so you are saying that the icons should be full circles. That is not what I see on my Mac.
On the Mac, I see these 1/4 icons in both Safari and Chrome.
They correctly display as full circles in Firefox.