Reduced test case: https://output.jsbin.com/pukiyuhada/7 iOS Safari 15.0: `background: none` works https://user-images.githubusercontent.com/921609/141961433-1bc431dc-510e-4bb0-aed0-d14ea0719483.png iOS Safari 15.1: `background: none` does not work https://user-images.githubusercontent.com/921609/141961558-85fd6db1-5633-4d2b-ad31-0941d2f64d8a.jpeg
*** This bug has been marked as a duplicate of bug 231503 ***