Created attachment 412324 [details] Testcase See testcase. The <svg> elements are rotated with CSS animations. The second spinner is offset by 0.8px from the top which somehow makes the spinner spin off-center.
> The second spinner is offset by 0.8px from the top which somehow makes the spinner spin off-center. It's possible that this is hardware dependent, so this value might have to be tweaked to reproduce.
<rdar://problem/70690654>