favicon different display safari

[cschm.tz]

Hey @arminunruh hope all is great!

I have noticed my favicon displaying differently on Safari and wondered if you knew why this happened? I have tried changing the size of the transparent png to see if it was a rendering issue, but this didn't change the black background which appears on the tabs. As the image below:

It should just be a white circle on a transparent background. When typing within the address bar in Safari it displays correctly though:

Chrome also gives no issues. Any clues on how to fix this?

Thanks so much for your help!
Christian

[arminunruh]

oh actually i have no idea ://