319381 2026-07-14 08:16:29 -0700 [css-anchor-position] scroll adjustments to anchored box don't account for transforms 2026-08-16 23:57:11 -0700 1 1 1 Unclassified WebKit Layout and Rendering Safari Technology Preview Unspecified Unspecified NEW InRadar P2 Normal --- 291856 1 dshin fantasai.bugs bfulgham emilio fantasai.bugs karlcow kiet.ho mordechai112 simon.fraser webkit-bug-importer zalan oldest_to_newest 2230168 0 480577 dshin 2026-07-14 08:16:29 -0700 Created attachment 480577 Minimum Reproducible Case STR: 1. Launch attached testcase (Tested on `Version 151.0.7883.0 (Official Build) canary (64-bit)`) 2. Scroll up and down Expected: Anchor positioned element (The purple square) should not "detach" from the anchor element (The pink square) Actual: The positioned element detaches from the anchor element when the scroller moves down, seemingly scrolling at a different rate from the anchor element. 2230214 1 webkit-bug-importer 2026-07-14 10:50:13 -0700 <rdar://problem/182219060> 480577 2026-07-14 08:16:29 -0700 2026-07-14 08:16:29 -0700 Minimum Reproducible Case anchor-xform-2.html text/html 693 dshin PCFET0NUWVBFIGh0bWw+CjxzdHlsZT4KLmFicy1jYiB7CiAgcG9zaXRpb246IHJlbGF0aXZlOwog IHdpZHRoOiA1MDBweDsKICBoZWlnaHQ6IDUwMHB4OwogIGJvcmRlcjogMXB4IHNvbGlkOwp9Cgou c2Nyb2xsZXIgewogIHdpZHRoOiA1MCU7CiAgaGVpZ2h0OiA1MCU7CiAgb3ZlcmZsb3c6IHNjcm9s bDsKICB0cmFuc2Zvcm0tb3JpZ2luOiB0b3AgbGVmdDsKICB0cmFuc2Zvcm06IHNjYWxlKDIpOwp9 CgouZmlsbGVyIHsKICB3aWR0aDogMXB4OwogIGhlaWdodDogMjAwcHg7Cn0KCi5hbmNob3Igewog IGFuY2hvci1uYW1lOiAtLWZvbzsKICB3aWR0aDogNTBweDsKICBoZWlnaHQ6IDUwcHg7CiAgYmFj a2dyb3VuZDogcGluazsKfQoKLnBvc2l0aW9uZWQgewogIHBvc2l0aW9uOiBhYnNvbHV0ZTsKICBw b3NpdGlvbi1hbmNob3I6IC0tZm9vOwogIHBvc2l0aW9uLWFyZWE6IGJvdHRvbSByaWdodDsKICB3 aWR0aDogNTBweDsKICBoZWlnaHQ6IDUwcHg7CiAgYmFja2dyb3VuZDogcHVycGxlOwp9Cjwvc3R5 bGU+CjxkaXYgY2xhc3M9YWJzLWNiPgogIDxkaXYgY2xhc3M9c2Nyb2xsZXI+CiAgICA8ZGl2IGNs YXNzPWZpbGxlcj48L2Rpdj4KICAgIDxkaXYgY2xhc3M9YW5jaG9yPjwvZGl2PgogICAgPGRpdiBj bGFzcz1maWxsZXI+PC9kaXY+CiAgPC9kaXY+CiAgPGRpdiBjbGFzcz1wb3NpdGlvbmVkPjwvZGl2 Pgo8L2Rpdj4K