Created attachment 379863 [details] testcase Safari on iOS 13.1.2 (17A860) does not render radial SVG gradients (<radialGradient/>) if they have an fx or a fy attribute whose value differs from the cx or cy attribute. I noticed this on a broken Firefox logo rendering: https://cdn.sso.mozilla.com/nlx/02cf955/images/firefox.svg See the attached file for a reduced testcase. There should be a green 100x100 square. But in iOS Safari (and all other iOS browsers), the page is blank.
<rdar://problem/55861856>
This is a platform bug, not WebKit. If you want to follow along you can file a bug at bugreport.apple.com
It is the same as https://bugs.webkit.org/show_bug.cgi?id=201390.